TY  - BOOK
AU  - Wratten,Stephen D.
AU  - Fry,Gary L.A.
TI  - Field and laboratory exercises in ecology
SN  - 0713127252
AV  - QH541 .W72 1980
PY  - 1980///
CY  - London
PB  - Edward Arnold
KW  - Ecology
KW  - Problems, exercises, etc
N1  - Bibliography: p.213-220. - Includes index
ER  -