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gerald a oravetz
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Water resources survey
Gerald A. Oravetz · State Engineer and State Water Conservation Board
73 sayfa · 1947
Irrigation / Water-supply
Water Resources Survey; 1949 Part 2
Gerald A. Oravetz, Montana State Engineer, Montana State Water Conservation Board · Creative Media Partners, LLC
Sayfa sayısı yok · 2021
Kategori yok
Water Resources Survey; 1946 Part 1
Gerald A. Oravetz, Montana State Engineer, Montana State Water Conservation Board · Creative Media Partners, LLC
Sayfa sayısı yok · 2021
Kategori yok
Water Resources Survey; 1946 Part 2
Gerald A. Oravetz, Montana State Engineer, Montana State Water Conservation Board · Creative Media Partners, LLC
Sayfa sayısı yok · 2021
Kategori yok