Migration Counts of Raptors at Hawk Mountain, Pennsylvania, as Indicators of Population Trends, 1934-1986
James C. Bednarz, Daniel Klem, Jr., Laurie J. Goodrich and Stanley E. SennerТом:
107
Мова:
english
Журнал:
The Auk
DOI:
10.2307/4087806
Date:
April, 1990
Файл:
PDF, 526 KB
english, 1990