Extinct Pennsylvania animals Shoemaker, Henry W., 1880-1958 creator text book [Altoona, Pa. The Altoona Tribune Publishing Co. 1917]-19. 1917 1919
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ENG Pennsylvania Zoology https://www.biodiversitylibrary.org/bibliography/54589 2013296 17013512 10.5962/bhl.title.54589 DLC