TY  - BOOK
AU  - Endler, John A
TI  - Geographic variation, speciation, and clines
SN  - 9780691081922
SN  - 76045896
U1  - 575 END 
PY  - 1977///
CY  - Princeton, NJ
PB  - Princeton University Press
KW  - Clines
KW  - Evolution (Biology)
ER  -