Encyclopedia of Earth - a free, expert-reviewed collection of content
contributed by scholars, professionals, educators, practitioners and other
experts who collaborate and review each other's work.
GIS Dictionary - from ESRI ArcGIS Resource Center.
Geologic Guidebooks of North America database - Detailed local geology
information.
Bibliography on Cold Regions Science and Technology and Antarctic
Bibliography - High latitude information.
Getty Thesaurus of Geographic Names® Online
