- eBookSoutheast Treasure Hunter's Gem & Mineral Guide (6th Edition)Kathy J. Rygle
- eBookSouthwest Treasure Hunter's Gem and Mineral Guide (6th Edition)Kathy J. Rygle
- eBookNortheast Treasure Hunter's Gem & Mineral Guide (5th Edition)Kathy J. Rygle
- eBookNorthwest Treasure Hunter's Gem and Mineral Guide (6th Edition)Kathy J. Rygle
- eBookSouthwest Treasure Hunter's Gem and Mineral Guide (5th ed.)Kathy J. Rygle
- eBookNorthwest Treasure Hunter's Gem and Mineral Guide (5th Edition)Kathy J. Rygle
- eBookNortheast Treasure Hunter's Gem and Mineral Guide (6th Edition)Kathy J. Rygle
- eBookSoutheast Treasure Hunter's Gem & Mineral Guide (5th Edition)Kathy J. Rygle