Long-term planning of water management. proceedings of the Seminar on Long-Term Planning of Water Management, Zlatni Piasatzi, Bulgaria, 17-22 May 1976. United nations
Material type:
- 333.91 UNI
At head of title: Economic Commission for Europe.
"United Nations publication. Sales no. E.76.II.E.27."
Includes bibliographical references.
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