TY  - BOOK
TI  - Biological science, an ecological approach
AV  - QH315 
U1  - 5 
PY  - 1987///
CY  - New york
PB  - Rand company
KW  - Biology
KW  - Study and teaching (Higher)
KW  - Ecology
N1  - "BSCS Green Version."; Includes bibliographies and index
ER  -