Author
United States. Congress. Senate. Committee on Energy and Natural Resources
8
United States. Congress. Senate. Committee on Environment and Public Works,
5
United States. Congress. House. Committee on Natural Resources
2
United States. Congress. Senate. Committee on Environment and Public Works
2
Netherlands
1
United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on Irrigation and Reclamation
1
United States. Congress. House. Committee on Resources
1
United States. Congress. House. Committee on Science and Technology (2007)
1
United States. Department of State
1