Logan, William Newton,  1869-1941. <br/><br/>
The sub-surface strata of Indiana, 
by William N. Logan, Division of geology. 
 - Fort Wayne,  Fort Wayne printing co.,  1931. 
 - 790 p. incl. illus., maps, tables.  23 cm. 
 - Indiana. Dept. of conservation. Publication  no. 108 .
<br/><br/>Bibliography: p. 15. 
<br/><br/><label>LCCN: </label>gs 32000025  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Indiana.
<br/><br/><label>LC Class. No.: </label>QE109  / .L65