TY  - GEN
AU  - Mayr, Ernst
TI  - Populations, Species, and Evolution. An Abridgement of Animal Species and Evolution
SN  - 0-674-69013-3
U1  - 581 
PY  - 1977///
CY  - Cambridge
PB  - Teh Belknap Press
KW  - POPULATION SPECIES EVOLUTION
ER  -