QH83 .A73 1955
575.01
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American Association for the Advancement of Science.
The species problem ; a symposium presented at the Atlanta meeting of the American Association for the Advancement of Science, December 28-29, 1955 / Edited by Ernst Mayr.
— Washington, 1957. ix, 395 p. : il., maps. ; 24 cm. — (Its Publication ; no. 50)
Incluye referencias bibliográficas.
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