Showing 1 - 2 results of 2 for search 'Tychsen, P. C. (Paul C.), 1916-', query time: 0.06s Refine Results
  1. 1
    Reconnaissance of geology and ground water in the lower Grand River Valley, South Dakota /

    Reconnaissance of geology and ground water in the lower Grand River Valley, South Dakota / by Tychsen, P. C. (Paul C.), 1916-

    Published 1955
    Government Document Book
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  2. 2
    Geology and ground-water hydrology of the Heart River irrigation project and the Dickinson area, North Dakota /

    Geology and ground-water hydrology of the Heart River irrigation project and the Dickinson area, North Dakota / by Tychsen, P. C. (Paul C.), 1916-, Swenson, Herbert A. (Herbert Alfred), 1911-

    Published 1950
    Online Access
    Government Document eBook
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