TY  - BOOK
AU  - Wratten,Stephen D.
AU  - Fry,Gary L.A
TI  - Field and laboratory exercises in ecology
SN  - 0713127252
PY  - 1980///
CY  - London
PB  - E. Arnold
KW  - Ecology
KW  - Problems, exercises, etc
KW  - Problems
N1  - Bibliography: p.213-220
ER  -