A Sample Collection for the sub-community http://hdl.handle.net/1811/461 2013-06-19T16:44:54Z 2013-06-19T16:44:54Z Report of the Geological Survey of Ohio[electronic resource] Geological Survey of Ohio http://hdl.handle.net/1811/5842 2008-08-25T21:25:29Z 1906-01-01T00:00:00Z Report of the Geological Survey of Ohio[electronic resource] Geological Survey of Ohio Text made available in compliance with Section 108 of the Copyright Revision Act of 1976 1906-01-01T00:00:00Z Geological Survey of Ohio