Iowa Geological Survey Bureau, USA
- http://www.igsb.uiowa.edu/
- Website of the Geological Survey Bureau of the Iowa Department of Natural Resources, including a Geologic Sample Database (GEOSAM)with geologic information for 35,000 locations in Iowa.
NASA's Global Change Master Directory
- http://gcmd.gsfc.nasa.gov/
- A comprehensive directory of information about Earth science data, including a broad coverage of the oceans, atmosphere, hydrosphere, solid earth, biosphere and human dimensions of global change.
USGS Global Change Research Program
- http://geochange.er.usgs.gov/
- The U.S. Geological Survey's Global Change Research Program is an international source for ground-based and remotely sensed earth science data and information used by global change researchers and contributing to assessments of the potential effects of global change on society.