SCHWOCHOW, STEPHEN D. <br/><br/>
PROCEEDING OF THE FIFTEENTH FORUM ON GEOLOGY OF INDUSTRIAL MINERALS 

 - 0 
 - DENVER-COLORADO-U.S.A.  COLORADO GEOLOGICAL SURVE  1980 
 - 138 pag  28 cm 
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<br/><br/>CONSTRUCCION MATERIALS AND LAND USE 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CIENCIAS PURAS
<br/><br/><label>Dewey Class. No.: </label>550  / S31