@book{ Solr-11555874, title = {Geology and mineral deposits of the Poncha Springs SE quadrangle, Chaffee County, Colorado}, series = {Geological Survey professional paper ;}, author = {Van Alstine, Ralph Erskine, 1914-}, editor = {Geological Survey (U.S.)}, editor = {Colorado. Mining Industrial Development Board}, address = {Washington}, publisher = {United States Department of the Interior, Geological Survey}, year = {1974}, pages = {19}, note = {Title from title screen (viewed October 2, 2014).}, note = {"Description of Precambrian, Tertiary, and Quaternary geology and examined deposits of copper-zinc, fluorspar, gravel and sand, manganese, and pegmatite in part of the Arkansas Valley."}, url = {http://purl.fdlp.gov/GPO/gpo88167} }