Forum on the Geology of Industrial Minerals, 25th , April 30 to May 2, 1990, Portland, Oregon.  Proceedings. Compiled and edited by Ronald P. Geitgey and Beverly F. Vogt
Contributors: Geitgey, R.P.; Vogt, B.F.
Publisher: Oregon Dept. of Geology and Mineral Industries
Place of publication: Portland
Language: eng
Number of pages: 100
Subjects: Industrial minerals
Other titles: Industrial rocks and minerals of the Pacific Northwest
Notes: 11