June Culp Zeitner

• Geodes
• Midwest gem trails
• Midwest gem, fossil, and mineral trails, Great Lakes states
• Gem and Lapidary Materials
• Midwest gem, fossil, and mineral trails, prairie states
• Midwest gem trails
• Borglum's unfinished dream
• Midwest Gem Trails Field Guide
• Midwest gem, fossil, and mineral trails
• Appalachian mineral & gem trails