TY  - BOOK
AU  - EFRAIM HALFON
TI  - THEORETICAL SYSTEM ECOLOGY
SN  - 0123187508
U1  - GN574.5018H138T 
PY  - 1979///
CY  - NEW YORK
PB  - Academic Press
KW  - THEORETICAL SYSTEM ECOLOGY
N1  - MODERN BOOK
ER  -