TY  - BOOK
AU  - Smith,Robert Leo
TI  - Elements of ecology and field biology
SN  - 0060463287
U1  - 574.5 
PY  - 1977///
CY  - New York
PB  - Harper & Row
KW  - Ecology
KW  - Biology -- Fieldwork
KW  - Ecologie
ER  -