PROCEEDINGS OF THE SECOND SEMINAR ON GEOCHEMICAL PROSPECTING METHODS AND TECNIQUES 

 - 0 
 - U.S.A.  UNITED NATIONS  1970 
 - 413 pag  28 cm 
 - 0  0 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>CIENCIAS PURAS
<br/><br/><label>Dewey Class. No.: </label>551.9  / U61