TY  - BOOK
AU  - ONeill , R.V., ed. 
AU  - Shugart, H.H., ed.
TI  - Systems ecology
SN  - 0879333472
U1  - 577.011 21st ed.
PY  - 1979///
CY  - Pennsylvania
PB  - Dowden, Hutchingson and Ross
KW  - Ecology
KW  - Mathematical models
ER  -