TY  - BOOK
AU  - Okun Daniel A
TI  - Regionalization of water management :  A revolution   
SN  - 0 85334 738 7
U1  - U22.3.N7, L7 
PY  - 1977///
CY  - London
PB  - Applied Science Publishers U K      
KW  - Hydrology
ER  -