{"id":"000027965","type":"book","title":"Research and service of the Illinois State Geological Survey.- Urbana, IL.- 23 S.: Ill","container-title":"Illinois State Geological Survey <Urbana-IL>: annual report of the Department of Registration and Education; July 1, 1968 - June 30, 1969","author":[{"family":"Frye","given":"John C."}],"issued":{"raw":"1970"}}