A version of Google that searches through academic resources. If you are on campus, you may be able to obtain full-text articles through a Google Scholar search.

From the Publisher: The GeoRef database, established by the American Geosciences Institute (AGI) in 1966, provides access to the geoscience literature of the world. GeoRef is the most comprehensive AGI database in the geosciences and continues to grow by more than 80,000 references a year. The database contains over 3.1 million references to geoscience journal articles, books, maps, conference papers, reports and theses.