Thwaites, F. T.  1883-1961. <br/><br/>
Stratigraphy and geologic structure of Northern Illinois,  with special reference to underground water supplies, 
by R. T. Thwaites. 
 - Urbana, Illinois  [Springfield,  Jeffersons Printing and Stationery Co.]  1927. 
 - 49 p.  illus. 
<br/><br/> At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey.  Plates folded in pocket. 
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>LCCN: </label>gs 28000083  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Illinois.<br/>Water-supply--Illinois.<br/>Groundwater.
<br/><br/><label>LC Class. No.: </label>QE105  / .T5