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Bob Lynch

Rocks and Minerals of Washington and Oregon: A Field Guide to the Evergreen and Beaver States
Rocks and Minerals of Washington and Oregon: A Field Guide to the Evergreen and Beaver States
2012
 Michigan Rocks & Minerals: A Field Guide to the Great Lake State
Michigan Rocks & Minerals: A Field Guide to the Great Lake State
2010
 Rocks & Minerals of Wisconsin, Illinois & Iowa: A Field Guide to the Badger, Prairie & Hawkeye States
Rocks & Minerals of Wisconsin, Illinois & Iowa: A Field Guide to the Badger, Prairie & Hawkeye States
2015