TY  - BOOK
AU  - Wratten,Stephen D.
AU  - Fry,Gary L.A.
TI  - Field and laboratory exercises in ecology
SN  - 0839141041
U1  - 577 
PY  - 1980///
CY  - Baltimore
PB  - University Park Press
KW  - Ecology
N1  - Includes index
ER  -