Bevan, Arthur Charles,  1888-1968. <br/><br/>
The Glenwood beds as a horizon marker at the base of the Platteville formation, 
by Arthur Bevan. Printed by authority of the state of Illinois. 
 - Urbana, Ill.,  1926. 
 - 13 p.  illus., map., tables.  25 cm. 
<br/><br/> At head of title: State of Illinois. Department of registration and education. Division of state geological survey. 
<br/><br/>Bibliographical foot-notes. 
<br/><br/><label>LCCN: </label>gs 26000138  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology, Stratigraphic--Ordovician.<br/>Geology--Illinois.
<br/><br/><label>LC Class. No.: </label>QE662  / .B4