TY  - BOOK
TI  -  State of the World 1991 : :  a Worldwatch Institute report on progre ss toward a sustainable society / 
SN  -  0393307336
U1  -  330.9 
PY  - 1991///
CY  -  New York : 
PB  -  W. W. Norton & Co. , 
KW  -  Environmental protection
KW  -  1991
KW  -  Environmental impact analysis
N1  -  Includes index
ER  -