Graham Hancock
United States. General Accounting Office
United States. Congress. Senate. Committee on Interior and Insular Affairs.
United States. Bureau of Land Management.
Unknown Author
H. S. Bluston
P. Le Tirant
Ernest R. Bartley
Fillmore C. F. Earney
Barbara Priestley
George Simons
United States. Congress. Senate. Committee on Energy and Natural Resources. Subcommittee on Energy Conservation and Supply.
José Gómez Muñoz
United States. Congress. Senate. Committee on the Judiciary
United States. Congress. House. Committee on the Judiciary