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1by Black, GladysContributors: “...Kleen, Vernon M....”
Published 1974
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2by Black, GladysContributors: “...Kleen, Vernon M....”
Published 1977
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3Iowa Ornithologists' Union, Quarterly field report, and Council Bluffs field notes, winter 1974-1975by Iowa Ornithologists' Union; Petersen, Peter C.; Wigg, MelbaContributors: “...Kleen, Vernon M.; Green, Ruth; Greer, Janet G.; Kain, Teta; Loth, Ed; Stuart, Caroline...”
Published 1974
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4by Ayers, Charles C., Jr.Contributors: “...Kleen, Vernon M.; Ayers, Darleen; Johnson, Thomas N.; Wymore, Gary D.; Iowa Ornithologists' Union...”
Published 1975
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