TY  - BOOK
AU  - Emlen,John Merritt
TI  - Ecology : : an evolutionary approach / 
T2  - Addison-Wesley series in life sciences
SN  - 0201018942
U1  - 574.5 
PY  - 1973///
CY  - Reading, Massachussets : 
PB  - Addison-Wesley, 
KW  - Ecologia
ER  -