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otto j helweg
8 cilt bulundu.
Cilt sonuçları
Water resources planning and management
Otto J. Helweg · Wiley
364 sayfa · 1985
Planning / Water resources development / Waterbronnen / Management / Planung
Supplying water and saving the environment for six billion people
Udai P. Singh, Otto J. Helweg · American Society of Civil Engineers
191 sayfa · 1990
Water-supply / Congresses / Water quality
Economic impact of water quality on river basin management
Otto J. Helweg · California Water Resources Center, University of California
61 sayfa · 1978
Agriculture / Economic aspects of Agriculture / Irrigation water / Quality / Saline waters
Microcomputer applications in water resources
Otto J. Helweg · Prentice Hall
152 sayfa · 1991
Data processing / Hydraulic engineering / Hydrology / Microcomputers
Improving well and pump efficiency
Otto J. Helweg · American Water Works Association
158 sayfa · 1983
Pumping machinery / Water-supply engineering / Wells