Illinois State Academy of Science geology field trip, guide leaflet :
Springfield area : Springfield County : Springfield and Divernon Quadrangles /
Leader George M. Wilson.
APA Citation
Illinois State Geological Survey. (1956). Illinois State Academy of Science geology field trip, guide leaflet: Springfield area : Springfield County : Springfield and Divernon Quadrangles. [Urbana, Ill.: Illinois State Geological Survey.
MLA Citation
Illinois State Geological Survey. Illinois State Academy of Science Geology Field Trip, Guide Leaflet: Springfield Area : Springfield County : Springfield And Divernon Quadrangles. [Urbana, Ill.: Illinois State Geological Survey, 1956.
Warning: These citations may not always be complete (especially for serials).