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1by Iowa Ornithologists' Union“...Compilation of sightings data for the Glaucous Gull submitted to the Iowa Ornithologists' Union...”
Published 1982
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2by Kent, Thomas H. (Thomas Hugh), 1934-“.... This item was used as supporting documentation for the Iowa Ornithologists Union Quarterly field report...”
Published 1980
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3by Getscher, Ione“... for the Iowa Ornithologists' Union Quarterly field report of spring 1979....”
Published 1979
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4by Kent, Frederick W. (Frederick Wallace), 1894-1984“... Ornithologists' Union Quarterly field report of winter 1965....”
Published 1964
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