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Preliminary report of some of the refactory clays of western Oregon,

By Wilson, Hewitt,.
[Portland, Ore.] 1938 .
iv, 93 p. , "This paper presents the results of work done under a cooperative agreement between the Bureau of Mines, the University of Washington and the Oregon State Department of Geology and Mineral Industries." | Photoprinted. 28 cm..

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Kaolin and china clay in the Pacific northwest,

By Wilson, Hewitt,.
Seattle, University of Washington, 1934 .
184 p. , "This paper presents the results of work done under a cooperative agreement between the Northwest experiment station, U.S. Bureau of mines, and the University of Washington, Seattle, Washington." 23 cm..

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Properties of quartz sands washed from kaolins of the Pacific northwest,

By Wilson, Hewitt..
Seattle, University of Washington, 1936 .
42, , "This paper presents the results of work done under a coperative agreement between the Northwest experiment station, U.S. Bureau of mines, and the University of Washington, Seattle, Washinton."

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Silica sands of Washington,

By Wilson, Hewitt,.
Seattle, University of Washington, 1942 .
76 p. , "This report represents work done under a cooperative agreement between the Bureau of Mines, United States Department of the Interior, and the College of Mines, University of Washington." 23 cm..

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