Waterbird conservation for the Americas: The North American waterbird conservation plan, version 1 - Kushlan, James; Steinkamp, Melanie J.; Parsons, Katharine; Capp, Jack; Cruz, Martin; Coulter, Malcolm; Davidson, Ian; Dickson, Loney; Edelson, Naomi; Elliot, Richard; Erwin, R.; Hatch, Scott; et al. (U.S. Fish and Wildlife Service, 2002)