TY  - BOOK
AU  - Krebs, Charles J. E
TI  - Ecology: the experimental analysis of distribution and abundance  
U1  - PA 574.5 K7 1978 
CY  - New York
PB  -  Harper
KW  - EcologÃ­a
KW  - FitogeografÃ­a
KW  - PoblaciÃ³n animal
KW  - ZoogeografÃ­a
ER  -