The GeoRef database is a bibliographic database that indexes scientific literature in the geosciences, including geology.
It is widely considered one of the preeminent literature databases for those studying the earth sciences.
"To maintain the database, GeoRef editor/indexers regularly scan more than 3,500 journals in 40 languages as well as new books, maps, and reports.
They record the bibliographic data for each document and assign index terms to describe it.
"[2] Major areas of coverage by GeoRef include: Print publications that correspond to GeoRef are Bibliography and Index of North American Geology; Bibliography of Theses in Geology; and the Geophysical Abstracts, Bibliography and Index of Geology Exclusive of North America.