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jerry j gray
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Bentonite in Oregon
Jerry J. Gray · Dept. of Geology and Mineral Industries
28 sayfa · 1989
Bentonite / Bentonite deposits
Rock material resources of Clackamas, Columbia, Multnomah, and Washington Counties, Oregon
Jerry J. Gray · State of Oregon, Dept. of Geology and Mineral Industries
54 sayfa · 1978
Nonmetallic minerals / Rocks
A survey of the secondary titanium market
Jerry J. Gray · U.S. Bureau of Mines; [for sale by the Supt. of Docs., U.S. Govt. Print. Off.
17 sayfa · 1972
Titanium industry
Rock material resources of Marion, Polk, Yamhill, and Linn counties, Oregon
Jerry J. Gray · State of Oregon, Dept. of Geology and Mineral Industries
47 sayfa · 1981
Clay / Gravel / Sand / Shale / Volcanic ash, tuff