Publisher
- Stanislaus County (Calif.)1
- U.S. Fish and Wildlife Service1
- UNEP World Conservation Monitoring Centre1
- UNEP executive series1
- United States. Bureau of Ocean Energy Management1
- United States. Environmental Protection Agency, Region IX1
- Vestra Resources, Inc. 1
- Washington Post Company1
- Washington',' D.c. U.s. Fish and Wildlife Service.1