@book{ Solr-2721847, title = {Preliminary map of manganese provinces in the conterminous United States}, series = {U.S. Geological Survey open-file report ;}, author = {Tooker, Edwin W., 1923-2013}, editor = {Cannon, William F.}, editor = {Geological Survey (U.S.)}, address = {Reston, Va.}, publisher = {U.S. Geological Survey}, year = {1980}, note = {Includes text, tables, and bibliographical references.}, }