McNulty, Faith. The whooping crane: the bird that defies extinction; introduction by Stewart L. Udall. - London, Longmans, 1967. ISBN: 30/- LCCN: 68121208 //r90 Nat. Bib. No.: B67-21217 Subjects--Topical Terms: Whooping crane. LC Class. No.: QL696.G8 / M23 1967 Dewey Class. No.: 598.3