Washington DC: US Geological Survey, 1923. n/a. 15pp, 8vo in tan wraps, reprinted from Bulletin of the American Association of Petroleum Geologists, Vol III No 5 Sept-Oct 1923. Very slight foxing to wraps, small moisture stain on from page, does not intrude into text, overall condition is Good.
Shelved Rockville Bookstore
Price: $25 save 25% $18.75