TY  - BOOK
AU  - Haila,Yrjo
AU  - Levins,Richard
TI  - Humanity and nature: ecology, science and society 
SN  - 0745306691
AV  - OH541 .H233 1992
U1  - 574.501 
PY  - 1992///
CY  - London
PB  - Pluto
KW  - Ecology  theory
KW  - Ecology
ER  -