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By: Bartos, Robert. - Olsen, P - Olsen, JType: ArticleIn: The journal of raptor researchVolume: 23Series:Issue: 3Date: 1989Page Range: 117--120Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-Subjects:
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By: Olsen, JType: ArticleIn: PhytologiaVolume: 68Series:Issue:Date: 1990Page Range: 137--137Publication Info: Bronx Park, New York H.A. Gleason and H.N. MoldenkeSubjects:
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By: Olsen, J - Olsen, PType: ArticleIn: Raptor researchVolume: 15Series:Issue: 2Date: 1981Page Range: 53--57Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Olsen, JType: ArticleIn: PhytologiaVolume: 67Series:Issue:Date: 1989Page Range: 107--108Publication Info: Bronx Park, New York H.A. Gleason and H.N. MoldenkeSubjects:
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By: Olsen, J - Olsen, PType: ArticleIn: Raptor researchVolume: 14Series:Issue: 1Date: 1980Page Range: 10--12Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects:
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By: Olsen, JType: ArticleIn: RhodoraVolume: 81Series:Issue:Date: 1979Page Range: 449--501Publication Info: [Cambridge, Mass., etc.] New England Botanical Club [etc.]Subjects:
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By: Olsen, JType: ArticleIn: Raptor researchVolume: 20Series:Issue: 1Date: 1986Page Range: 41--41Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]Subjects: