Silica in Oregon
By: by Ronald P. Geitgey ; appendix by Gary L. Baxter.
Contributors: Oregon. Dept. of Geology and Mineral Industries.
Series: Special paper,; 22; Special paper (Oregon. Dept. of Geology and Mineral Industries) ;; 22.
Publisher: State of Oregon, Dept. of Geology and Mineral Industries
Published: 1990
Place of publication: Portland, Or
Language: eng
Number of pages: 18
Subjects: Silica -- Oregon.
Notes: Includes bibliographical references (p. 13-14).
Issued in envelope.