Provides access to the geoscience literature of the world. The database contains references to geoscience journal articles, books, maps, conference papers, reports and theses. The GeoRef database covers the geology of North America from 1785 to the present and the geology of the rest of the world from 1933 to the present. The database includes references to all publications of the U.S. Geological Survey. Masters' theses and doctoral dissertations from US and Canadian universities are also covered. The GeoRef database, established by the American Geological Institute (AGI) in 1966,