GEOBASE
GEOBASE is a multidisciplinary database of indexed research literature on the earth sciences, ecology, geology, human and physical geography, environmental sciences, oceanography, geomechanics, alternative energy sources, pollution, waste management, and nature conservation.
GeoRef
GeoRef, published by the American Geosciences Institute, contains more than 3.3 million abstract records from geoscience journals, books, maps, conference papers and more. Dating back to 1669 for North America and 1933 for the rest of the world.