TY  - BOOK
AU  - Benton, Allen H.
AU  - Wernerm, William E., Jr.
TI  - Principles of field biology and ecology
U1  - 574.072 
PY  - 1958///
CY  - New York
PB  - McGraw-Hill
KW  - BiologÃ­a
KW  - InvestigaciÃ³n
KW  - EcologÃ­a
ER  -