TY  - BOOK
AU  - Mayr, Ernst,
TI  - Animal species and evolution
U1  - 575 MAY 
PY  - 1963///
CY  - Cambridge
PB  - Belknap Press of Harvard University Press
KW  - Animal species
KW  - Animals
KW  - Variation
KW  - Evolution (Biology)
N1  - 1970 ed. published under title: Populations, species, and evolution; Includes bibliographical references (p. 675-781)
ER  -