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Are you Mark J. Camp, author of the books below?
Roadside Geology of Ohio by Mark J. Camp Roadside Geology of Indiana by Mark J. Camp Railroad Depots of Southwest Ohio by Mark J. Camp Railroad Depots of Northwest Ohio (OH) by Mark J. Camp Railroad Depots of East Central Ohio by Mark J. Camp Railroad Depots of Northeast Ohio by Mark J. Camp Railroad Depots of West Central Ohio by Mark J. Camp Railroad Depots of Central Ohio by Mark J. Camp Ohio Oil and Gas by Jeff A. Spencer Images of Rail by Douglas W. Mengers


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