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Arnold Mary Daisy ca. 1873-1955. "Pyrus Communis: Beierschmitt." ,

APA

Arnold Mary Daisy ca. 1873-1955, A. Mary Daisy ca. 1873-1955. (0000). Pyrus communis: Beierschmitt.

Chicago

Arnold Mary Daisy ca. 1873-1955 "Pyrus communis: Beierschmitt" (1928):