Pearl, Richard M.,  1913-1980, <br/><br/>
Colorado gem trails and mineral guide / 
[by] Richard M. Pearl. Sketch maps by Mignon Wardell Pearl. 
 - 222 pages  illustrations  23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Precious stones--Collection and preservation--Colorado.<br/>Minerals--Collection and preservation--Colorado.
<br/><br/><label>Dewey Class. No.: </label>549.9/788