Birds of the great plains: breeding species and their distribution.
Lincoln: University of Nebraska Press, 1979. Octavo, colour photographs, text illustrations, maps, fine copy in dustwrapper. More
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Diving birds of North America.
Lincoln: University of Nebraska Press, 1987. Quarto, colour photographs, fine copy in dustwrapper. More
Ducks in the wild: conserving waterfowl and their habitats.
Shrewsbury: Airlife, 1992. Octavo, colour illustrations, maps. With colour photographs of each of the 111 species, an identification guide and a map showing distribution. More
The hummingbirds of North America.
Washington: Smithsonian, (1997. second edition). Quarto, 24 colour plates, text illustrations, maps. More
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