http://pec.lib.wvu.edu/record/P10791951Logs of field trips (September 13 (P M), September 15 (A M) : Industrial Minerals Division (non-metallics) sponsored by the Central Appalachian and Ohio Valley Section, A. I. M. E. Fall Meeting, Morgantown, West Virginia, September 13-15, 1951.<p> Pamphlet.</p>American Institute of Mining and Metallurgical Engineers. Central Appalachian and Ohio Valley Section--Congresses.14256