Author/Creator
- Library of Congress. Congressional Research Service412
- United States. Congress. House353
- United States344
- Geological Survey (U.S.), issuing body173
- Geological Survey (U.S.)144
- United States. Geological Survey142
- United States. Department of State51
- United States. Congress. House. Committee on Interstate and Foreign Commerce. (1892- 1981)48
- United States. Congress. Senate38
- ebrary, Inc36
- United States. Department of the Interior. Bureau of Mines (1934- )34
- United States. General Accounting Office33
- Geological Society of London31
- American Chemical Society. Division of Petroleum Chemistry, sponsoring body30
- Middleton, Jefferson30
- United States. Department of the Interior30
- Coons, Altha Titsworth29
- United States. Congress. Senate. Committee on Interior and Insular Affairs. (1948-1977)28
- Adam Matthew Digital (Firm), digitiser25
- United States. Congress. House. Committee on Public Lands. (1805-1951)25