Black duck distribution, harvest characteristics, and survival
By: by Aelred D. Geis, Robert I. Smith and John P. Rogers.
Contributors: Smith, Robert I.; Rogers, John P.
Publisher: U.S. Government Printing Office
Published: 1971
Place of publication: Washington
Number of pages: 241
Subjects: Black duck
Notes: For appendix and tables, see Microfiche QL696.A5G451.