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1by DuMont, Philip A. (Philip Atkinson), 1903-1996Subjects: “...Birds--Identification...”
Published 1940
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2by Peters, James Lee, 1889-1952Subjects: “...Birds--Identification...”
Published 1934
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3by Swenk, Myron H.Subjects: “...Birds--Identification...”
Published 1935
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4Joseph Grinnell letter to Philip DuMont regarding Savannah Sparrow identification, November 17, 1933by Grinnell, Joseph, 1877-1939Subjects: “...Birds--Identification...”
Published 1933
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5by DuMont, Philip A. (Philip Atkinson), 1903-1996Subjects: “...Birds--Identification...”
Published 1933
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6by Metcalf, H. J.Subjects: “...Birds--Identification...”
Published 1932
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7by DuMont, Philip A. (Philip Atkinson), 1903-1996Subjects: “...Birds--Identification...”
Published 1956
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8by DuMont, Philip A. (Philip Atkinson), 1903-1996Subjects: “...Birds--Identification...”
Published 1933
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9by DuMont, Janetta A.Subjects: “...Birds--Identification...”
Published 1934
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10by Rosene, Walter M., Sr., 1880-1941Subjects: “...Birds--Identification...”
Published 1928
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12by Praeger, William EmiliusSubjects: “...Birds--Identification...”
Published 1934
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13
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14Subjects: “...Bird watching--Birds--Identification--Dial-a-message telephone calls...”
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15
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16by DuMont, Philip A. (Philip Atkinson), 1903-1996Subjects: “...Birds--Identification...”
Published 1934
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17Subjects: “...Bird watching--Birds--Identification--Birds--Nests--Birds--Infancy...”
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18by Stempel, Max A.Subjects: “...Birds--Identification...”
Published 1935
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19by Lowell, Margaret HerdliskaSubjects: “...Birds--Identification...”
Published 1952
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