Author: HOBLITT, R.P.
Title: Observations of the eruptions of July 22 and August 7, 1980, at Mount St. Helens, Washington.
Description: 1986. US Geological Survey Prof. Paper 1335; 44 pp. col. fp. 13 fig./phot. Orig. wrps. libr. sticker on front cover, otherwise very good, 4to.

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