Thompson, Rick  <br/><br/>
The hunt for iceberg erratics :   ice-rafted erratic boulders from the northern Rocky Mountains now residing in Northwest Oregon and Southwest Washington / 
by Rick Thompson and Sylvia Thompson 
 - Portland :  Rick Thompson,  2013. 
 - 32 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oregon<br/>Washington (State)<br/>Boulders
<br/><br/><label>LC Class. No.: </label>QE697.T46 2013