Physical description for original version: vi, 84 p. : 28 cm
書誌注記
Includes bibliographical references
原資料等に関する注記
原資料の出版事項: Boise, Idaho (3948 Development Ave., Boise 83705) : U.S. Dept. of the Interior, Bureau of Land Management, Raptor Research and Technical Assistance Center, [1993]