@book{ Solr-5628467, title = {Millbrig sheet of the lead and zinc district}, series = {Bulletin (Illinois State Geological Survey) ;}, author = {Higgins, Daniel F.}, editor = {Perdue, M. J.}, editor = {Grant, U. S. (Ulysses Sherman), 1867-1932}, editor = {Illinois State Geological Survey}, address = {Urbana}, publisher = {Illinois State Geological Survey, The Matthews-Northrup Works)}, year = {1908}, note = {Detached from: Year-book for 1907 / Illinois State Geological Survey. Urbana : University of Illinois, 1908. Bulletin (Illinois State Geological Survey) no. 8.}, note = {Relief shown by contours and spot heights.}, note = {Contour interval 10 feet.}, note = {"H. Foster Bain, director."}, }