TY  - BOOK
AU  - Levins, Richard
TI  - Evolution in changing environments: some theoretical explorations
T2  - / edited by Robert H. Macarthur
U1  - 591.5 
PY  - 1968///
CY  - Princeton
PB  - Princeton University Press
KW  - Animal population
KW  - Population genetics
KW  - Evolution
N1  - Includes bibliography
ER  -