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By: Springer, M AType: ArticleIn: Raptor researchVolume: 13Series:Issue: 1Date: 1979Page Range: 19--19Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Kirkley, John S - Springer, M AType: ArticleIn: Raptor researchVolume: 14Series:Issue: 1Date: 1980Page Range: 22--28Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects: