Zeitner, J. C. (1964). Midwest gem trails: A field guide for the gem hunter, the mineral collector, and the tourist (3rd ed., completely rev.). Gembooks.
Chicago Style (17th ed.) CitationZeitner, June Culp. Midwest Gem Trails: A Field Guide for the Gem Hunter, the Mineral Collector, and the Tourist. 3rd ed., completely rev. Mentone, Calif.: Gembooks, 1964.
MLA (9th ed.) CitationZeitner, June Culp. Midwest Gem Trails: A Field Guide for the Gem Hunter, the Mineral Collector, and the Tourist. 3rd ed., completely rev. Gembooks, 1964.
Warning: These citations may not always be 100% accurate.