United nations
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 - New York, United Nations 1976 - 3Vols 28 cm.
At head of title: Economic Commission for Europe. "United Nations publication. Sales no. E.76.II.E.27."
Includes bibliographical references.
Water resources development --Congresses
333.91 / UNI
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 - New York, United Nations 1976 - 3Vols 28 cm.
At head of title: Economic Commission for Europe. "United Nations publication. Sales no. E.76.II.E.27."
Includes bibliographical references.
Water resources development --Congresses
333.91 / UNI