Most Popular Books
- A Geologic and Inclusion Study of the Keokuk, Iowa, Missouri, and Kentucky Sedimentary Geodes
- A Geologic and Inclusion Study of the Fairburn and Dryhead Agates, Jaspers, and Cherts
- A Southwestern Field Guide to the Agates, Jaspers, and Opals, Volume I--The Geology of their Formation, Inclusions, and Structures
