TY  - BOOK
AU  - Tolba,Mostafa Kamal
TI  - Sustainable development: constraints and opportunities 
SN  - 0408008776 :  
AV  - TD170.3 .T66 1987
PY  - 1987///
CY  - London, Boston
PB  - Butterworths
KW  - United Nations Environment Programme
KW  - Environmental policy
KW  - Environmental protection
N1  - Includes index
ER  -