Martinez, G. M. <br/><br/>
Recovery of byproduct heavy minerals from sand and gravel operations in Oregon and Washington / 
by G.M. Martinez, J.M. Gomes, and M.M. Wong. 
 - [Washington, D.C.?] :  U.S. Dept. of the Interior, Bureau of Mines,  1981. 
 - 14 p. :  ill., 1 map. 
 - Report of investigations - Bureau of Mines ;  8563 .
 - Report of investigations (United States. Bureau of Mines) ;  8563. .
<br/><br/><label>LCCN: </label>90052068     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Quarries and quarrying--By-products.--Oregon<br/>Quarries and quarrying--By-products.--Washington (State)<br/>Heavy minerals--Oregon.<br/>Heavy minerals--Washington (State)