Subject
Water resources development History
13
History
8
Dams History
4
Irrigation History
4
Reclamation of land History
4
Water-supply History
3
Hydroelectric power plants History
2
Hydrology
2
Water-power History
2
West (U.S.) History
2
Arch dams Design and construction History
1
Dams
1
Dams Design and construction History
1
Earth dams Design and construction History
1
Irrigation Government policy History
1
Water resources development
1
Water-supply
1
West (U.S.) Economic conditions
1