TY  - BOOK
AU  - Ewer, D.W.
AU  - Hall, J.B.
TI  - Ecology biology: : Practical Book 2
SN  - 0582650461
AV  - QH541.E9 1980 
PY  - 1980///
CY  - Essex
PB  - Longman group ltd
KW  - Ecology
KW  - Environmental sciences
ER  -