Riggs, Calvin Harold,  1905- <br/><br/>
Geology of Allegan county, 
by C. H. Riggs. 
 - [Lansing]  1938. 
 - 29numb. 1.  incl. tables. 8 fold. maps, 5 fold. plans.  28 cm. 
 - Michigan. Dept. of Conservation. Geological survey division. Progress report,  no. 4 .
<br/><br/> cover-title.  At head of title: State of Michigan. Department of conservation ... Geological survey division.  Photoprinted.  Folded maps and plans in pocket. 
<br/><br/><label>LCCN: </label>gs 39000104  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Michigan--Allegan County.
<br/><br/><label>LC Class. No.: </label>TN24.M5  / A34 no. 4 
<br/><br/><label>Dewey Class. No.: </label>553/.09774