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Long-term planning of water management : proceedings of the Seminar on Long-Term Planning of Water Management, Zlatni Piasatzi, Bulgaria, 17-22 May 1976 | Bok | 556(061.3) S
Seminar on Long-Term Planning of Water Management (1976 : Zlatni Piasatzi, Bulgaria) / - New York : United Nations, 1976. - 99 s. - Språk: Engelsk | Seminar on Long-Term Planning of Water Management | 1976 |