This is a lot of (12) various geological survey books. Includes:Minerals for Industry Southern California (1964)Dust Control Handbook for Industrial Minerals Mining and Processing (2019)Applications of Rock Mechanics (1975)A Primer of Oilwell Drilling (1970)New Mexico Geological Society Guidebook of Southwestern New Mexico (1953)Geologic Guidebook of the San Francisco Bay Counties (1951)Oil Shale Technical Data Handbook (1981)Oil from Shale and Tar Sands (1975)The Physical Chemistry and Mineralogy of Soils Volume 1 – Soil Materials (1964)Basalts (1984)Summary of Mining and Petroleum Laws of the World – Western Hemisphere (1970)Subsurface Geology of the Lower Columbia and Willamette Basins, Oregon Books are in various used conditions-some are in very good condition while others have some wear. See pics for more details.