Books
Southwest Treasure Hunter's Gem and Mineral Guide (6th Edition)
2016
Northeast Treasure Hunter's Gem and Mineral Guide (6th Edition)
2016
Northwest Treasure Hunter's Gem and Mineral Guide (5th Edition)
2011
Southwest Treasure Hunter's Gem and Mineral Guide (5th ed.)
2011
Northeast Treasure Hunter's Gem & Mineral Guide (5th Edition)
2011
Southeast Treasure Hunter's Gem & Mineral Guide (6th Edition)
2016