Outline of the geologic history of Ottawa County, 
by Helen M. Martin. 
 - [Lansing,  1958] 
 - 3 p.  illus. maps.  28 cm. 
<br/><br/><label>LCCN: </label>gs 62000039  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Michigan--Ottawa County.
<br/><br/><label>LC Class. No.: </label>QE126.O8  / M3