1. Manganese contents of some sedimentary rocks of Paleozoic Age in Virginia Author/Creator: Force, Eric R., author Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading
2. Manganese contents of some sedimentary rocks of Paleozoic age in Virginia Publication/Creation: [Washington, D.C.] : U.S. G.P.O., 1991 Resource Type: Book Access & Availability: Loading