@book{ Solr-9981151, title = {General map of the anthracite coal fields of Pennsylvania}, author = {Ruley, William W.}, editor = {Geological Survey (U.S.)}, editor = {Bureau of Anthracite Coal Statistics}, address = {Philadelphia}, publisher = {Bureau of Anthracite Coal Statistics}, year = {1906}, note = {Includes table showing shipments for Wyoming region, Lehigh region, and Schuylkill region between 1820 and 1905.}, }