Trumpeter swans
Subtitle: "a closer look"
By: prepared by United States Department of Agriculture, Forest Service
Contributors: United States. Forest Service. Intermountain Region
Series: Leaflet -- no. 26.32; Leaflet (United States. Dept. of Agriculture) -- no. 26.32
Publisher: The Service
Published: 1981
Place of publication: Ogden, Utah
Language: eng
Subjects: Trumpeter swan; Birds -- United States
Notes: "US Department of Agriculture, Forest Service, Intermountain Region"--P. [8]