TY  - BOOK
AU  - Benton,Allen H.
AU  - Werner,William Ernest
TI  - Principles of field biology & ecology / 
U1  - 574.9 BEN 
PY  - 1958///
CY  - New York: 
PB  - McGraw-Hill, 
KW  - Biology
KW  - Fieldwork
KW  - Ecology
N1  -  Includes bibliography
ER  -