TY  - BOOK
AU  - Hallare, Arnold V.
TI  - General ecology: concepts and selected laboratory exercises 
SN  - 9717472068
AV  - QH 541 .H182 2001
U1  - HS 574.5  
PY  - 2001///
CY  - Manila
PB  - Busybook Distributors
ER  -