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1Published 1979Subjects: “...Birds Classification....”
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5by Sibley, Charles G. (Charles Gald), 1917-1998Subjects: “...Birds Classification....”
Published 1955
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6by Monroe, Burt L. (Burt Leavelle), 1930-Subjects: “...Birds Classification....”
Published 1993
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8Published 2003Subjects: “...Birds Classification....”
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10by Sibley, Charles G. (Charles Gald), 1917-1998Subjects: “...Birds classification....”
Published 1990
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14by Miller, Alden H. (Alden Holmes), 1906-1965Subjects: “...Birds Classification....”
Published 1931
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16by Beddard, Frank E. (Frank Evers), 1858-1925Subjects: “...Birds Classification....”
Published 1898
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