Objectives: This pilot study analyzes citation patterns of international health (IH) research. The authors hypothesize that researchers use journal articles more than other resources as other public health literature mapping projects have shown. This study's objective is to identify key journals in IH and unique or common citation patterns in IH in comparison to areas like infectious disease or environmental health.

Methods: The authors selected research articles published in January 2013 issues of four IH journals: Bulletin of the World Health Organization (BWHO), Health Policy and Planning (HPP), Lancet Infectious Diseases (LID), and the Journal of Health, Population and Nutrition (JHPN). The criteria for journal selection were based on Core Public Health Journals Project version 2.0, Journal Citation Reports (JCR), and Scopus. Data were collected by compiling all citations used by research articles. In addition to journals, books, and other published sources, this study identifies cited sources of gray literature in IH and the extent to which Internet sources are used in formal IH research. With open data trends in mind, this study looks for the citation of data sets.

Results: Out of 1,246 total citations, 817 (66%) were journal articles, 210 (17%) were miscellaneous, 205 (16%) were books/monographs, and 14 (1%) were government documents. The most highly cited journal titles were Lancet (86 citations) and BWHO (33 citations). Two journals that the authors expected to have high citations, but did not, were Lancet: Infectious Disease and American Journal of Public Health. The poster will also include:

1. Cited journals by subject.
2. Publication date of citations.
3. Examination of the miscellaneous category for data set citations.

Conclusions: Journal articles remain the most highly cited source type for public health research, seconded by gray literature and web resources; then monographs and United States government documents. Gray literature and web resources represent information provided by governments throughout the world, including 5 examples of government data sets. Compared to previous public health journal studies with journal article citation close to 90%, this study shows a lower percentage of journal articles (66%) relative to other source types. While recent articles are cited most, cited journal articles greatly range in age at citation. This study also showed lower citations of typically highly cited public health journal titles and major medical journals. There is a need for older journals. Librarians may want to focus on clinical journals that are relevant to their programs. Citation of data sets does not seem common yet, but this is something to monitor regarding public health data sources. Future studies could look at whether availability of global online government sources and online translation tools may be resulting in greater use of multiple language sources.

Dramatic changes in land use were associated with the rise of agriculture in the mid Holocene in the Mediterranean region. Both surface properties and drainage networks were changed along with direct modifications to surface properties (vegetation removal and change, sediment liberation and compaction); consequent drainage alteration (terracing, canals) and up and downstream responses in the watersheds communicated these changes throughout the landscape.

The magnitude, rate, and feedbacks with the growing human populations are critical questions in our effort to assess human-landscape interactions. To investigate these relationships, recent field work in the Penaguila Valley of southeast Spain included landform mapping, alluvial deposit description, and sample collection emphasizing areas of active erosion, remnant land surfaces and their relation to archaeological sites.

We have updated our geomorphic maps by refining the delineation of alluvial terraces, steep-walled (40m deep) drainages ("barrancos"), and hollows ("barrancos de fondo plano"). Hollows are curved, elongate, flat-bottomed gullies with steep walls (2-30m tall) and extend headward from the main barrancos. This work enables more accurate terrace correlations necessary for both landscape evolution modeling and interpretation of the development history of the basin.

Alluvial terraces are crucial to this research because they record periods of past stable topography. In the Penaguila, sites dating back to late Mesolithic and early Neolithic (around 6600 BP) and subsequent periods (Chalcolithic and Bronze Age) are exposed on a prominent terrace surface mapped as Terrace A. This broad low relief surface is scarred by deep barrancos and hollow formation that expose bedrock marls and overlying alluvial deposits. Stratigraphic profiles and texture analyses of Terrace A deposits reveal overland flow facies and channel networks in reworked and CaCO3-encrusted marls, and several organic-rich paleosols. Small remnant surfaces mapped as Terrace Z (below Terrace A) were observed within the main barrancos and indicate a later, brief accumulation period with subsequent incision to the modern channel.

Holocene landscape development in the Penaguila appears to have progressed from a period of stability to slope denudation with aggradation (stream infilling) followed by rapid incision which initiated sometime near the time of occupation. This change from a low relief alluvial surface to one cut by narrow channels may have been an important shift for local populations. Their response to that environmental modification may be associated with the horticulturalist to agricultural intensification noted in the archaeological record. Tighter chronology and better understanding of the driving processes for barranco incision and hollow formation will improve our ability to correlate the changing landscape with land use practices. Such an improved correlation leads to better understanding of human-landscape interactions.