Trends in duck breeding populations, 1955-1990 的封面图片
Trends in duck breeding populations, 1955-1990
TITLE_DISPLAY:
Trends in duck breeding populations, 1955-1990 [microform]
个人著者:
Johnson, F. A. (Frederick Ashby), 1903-
出版信息:
Laurel, MD : Dept. of the Interior, U.S. Fish and Wildlife Service, Office of Migratory Bird Management, 1990.
格式:
缩微
物理描述:
11 p. : ill., map. ; 28 cm.
主题词汇:
Ducks -- United States -- Counting.

Bird populations -- United States.
附加团体著者:
U.S. Fish and Wildlife Service. Office of Migratory Bird Management.