Catalog of California seabird colonies
Washington, D.C. :Coastal Ecosystems Project, Office of Biological Services, Fish and Wildlife Service, U.S. Dept. of the Interior :1980.
Prelinger Library (archive.org)
Evidence reported by ian frederick-rothwell for item catalogofcalifor00coasrich on April 16, 2007: no visible notice of copyright; stated date is 1980.