TY  - BOOK
ED  - United Nations. Economic Commission for Europe
TI  - Long-term planning of water management: proceedings of the seminar on long-term planning of water management, Zlatni Piasatzi (Bulgaria)17-22 May 1976
U1  - 333.91 21st
PY  - 1976///
CY  - New York
PB  - United Nations
KW  - Water quality-Management; Water resources development; Water conservation; Water resources development-Environmental aspects
ER  -