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By: Whitfield, Douglas W. A. - Gerrard, Jonathan M. - Maher, William J - Davis, D. Wayne
Type: Article
In: The Canadian field-naturalist
Volume: 88
Series:
Issue: 4
Date: 1974
Page Range: 399--407
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
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By: Gerrard, Jonathan M. - Whitfield, Douglas W. A. - Gerrard, Peter - Gerrard, P. Naomi - Maher, William J
Type: Article
In: The Canadian field-naturalist
Volume: 92
Series:
Issue: 4
Date: 1978
Page Range: 375--382
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
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By: Gerrard, P. Naomi - Wiemeyer, Stanley N. - Gerrard, Jonathan M.
Type: Article
In: Raptor research
Volume: 13
Series:
Issue: 2
Date: 1979
Page Range: 57--64
Publication Info: Vermillion, S.D, Raptor Research Foundation, [1972-1986]
Subjects:
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By: Gerrard, Jonathan M. - Gerrard, P. Naomi - Whitfield, Douglas W. A.
Type: Article
In: The Canadian field-naturalist
Volume: 94
Series:
Issue: 4
Date: 1980
Page Range: 391--397
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
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By: Bortolotti, Gary R. (Gary Roy), - Dzus, E H - Gerrard, Jonathan M.
Type: Article
In: The journal of raptor research
Volume: 22
Series:
Issue: 2
Date: 1988
Page Range: 66--67
Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
Subjects:
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By: Dzus, E H - Gerrard, Jonathan M.
Type: Article
In: The Canadian field-naturalist
Volume: 103
Series:
Issue: 1
Date: 1989
Page Range: 29--33
Publication Info: Ottawa Ottawa Field-Naturalists' Club
Subjects:
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By: Gerrard, Jonathan M. - Gerrard, P. Naomi - Bortolotti, Gary R. (Gary Roy), - Dzus, E H
Type: Article
In: The journal of raptor research
Volume: 26
Series:
Issue: 3
Date: 1992
Page Range: 159--166
Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
Subjects:
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By: Gerrard, Jonathan M. - Harmata, A R - Gerrard, P. Naomi
Type: Article
In: The journal of raptor research
Volume: 26
Series:
Issue: 4
Date: 1992
Page Range: 229--234
Publication Info: Hastings, Minn, Raptor Research Foundation, ©1987-
Subjects: