Trumpeter swans
Subtitle: "a closer look"
By: prepared by United States Department of Agriculture, Forest Service
Publisher: The Service
Published: 1980
Place of publication: Ogden, Utah
Language: eng
Subjects: Rare birds; Trumpeter swan; Birds
Notes: "US Department of Agriculture, Forest Service, Intermountain Region"--P. [8]

"26.32.400.11/80"--P. [8].