Merrill, Charles White <br/><br/>
Samll-scale placer mines as a source of gold, employment, and livelihood in 1935. 

 - Philadelphia :  Works Progress Aministration,  1937. 
 - 52 p. :  il. ;  25 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Minería<br/>Mina<br/>Oro
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>622.342