1. Anderson D.W., Hickey J.J., (1972). Eggshell changes in certain North American birds Proc. Int. Ornithol. Congr. 15:514–40
2. Blus L.J., Neely B.S. Jr., Belisle A.A., Prouty R.M., (1974). Organochlorine residues in brown pelican eggs: relation to reproductive success Environ. Pollut. 7:81–91
3. Buck, J. and Sproul, E. (1999). Organochlorine contaminants in double-crested cormorants from Lewis and Clark National Wildlife Refuge in the Columbia River Estuary. Final Report, Project 13420–1261-1N14. US Fish and Wildlife Service, Oregan State Office, Portland, OR, USA
4. Campbell, R.W., Dawe N.K., McTaggart-Cowan I., Cooper J.M., Kaiser G.W. and McNall M.C.E. (1990). The Birds of British Columbia. Volume One – Nonpasserines. Introduction, Loons Through Waterfowl. Royal British Columbia Museum, Victoria, BC, Canada
5. Carter H.R., Sowls A.L., Rodway M.S., Wilson U.W., Lowe R.W., McChesney G.J., Gress F., Anderson D.W., (1995). Population size, trends, and conservation problems of the double-crested cormorant on the Pacific Coast of North America Colon. Waterbirds 18(Spec. Pub. 1):189–215