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By: Hopkins, Rick B. - Cassel, J. Frank, - Bjugstad, Ardell J. - Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)Edition:Publication info: Fort Collins, Colo, Rocky Mountain Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture, 1986Volume: no.270Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections:
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By: Linz, George M - Vakoch, Daniel L. - Cassel, J. Frank, - Carlson, Robert BruceType: ArticleIn: The Canadian field-naturalistVolume: 98Series:Issue: 1Date: 1984Page Range: 38--44Publication Info: Ottawa Ottawa Field-Naturalists' ClubSubjects:
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By: Snyder, Dana P. - Cassel, J. Frank,Type: ArticleIn: The Wilson bulletinVolume: 63Series:Issue: 3Date: 1951Page Range: 177--180Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects:
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By: Avery, Michael L. - Springer, Paul F - Cassel, J. Frank,Type: ArticleIn: The Wilson bulletinVolume: 89Series:Issue: 2Date: 1977Page Range: 291--299Publication Info: Columbus, Ohio, Wilson Ornithological Society, 1894-Subjects: