Anderson, Raymond <br/><br/>
Clastic rocks associated with the midcontinent rift system in Iowa. 

<br/><br/><label>Standard No.: </label>US GEOLOGICAL SURVEY BULLETIN 1989-1 
<br/><br/><label>Subjects--Index Terms: </label>GEOLOGIA 
<br/><br/><label>Universal Decimal Class. No.: </label>551.4