Minerals of Ohio, Bulletin 69, by Ernest H. Carlson, 155 p., 32 maps and line drawings, 32 black-and-white photos, 11 tables, and four plates of color photos of Ohio minerals, 1991.

Bulletin 69 lists known occurrences for 45 minerals in the state. The geological occurrence of minerals in Ohio is discussed, as well as how to collect and identify minerals. A key to Ohio mineral species and a by-county listing of Ohio minerals are provided. Selected localities for mineral-collecting field trips are described.