- Department of Interior Homepage
- U. S. Geological Survey Homepage
- The National Park Service.
Recreational opportunities on Federal Lands, a cross-agency site.
- General Land Office Records: an index to historical
land office patent sales from the Bureau of Land Management.
- Fish and Wildlife Service
- Minerals Yearbook: available from
Univ. of Wisconsin Madison, the full image of all yearbooks between 1932 and 1993.