Johnson, L. A. <br/><br/>
Properties of Utah tar sands : Asphalt Wash Area, P.R. Spring deposit 
Johnson, L. A.; Cupps, Cecil Q.; Marchant, L. C. 
 - Washington  Bureau of mines  1975 
 - 27 p. 
 - RI 8030 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA<br/>MINING
<br/><br/><label>Subjects--Geographic Terms: </label><br/>UTAH (ESTADOS UNIDOS)<br/>UTAH (UNITED STATES)
<br/><br/><label>Subjects--Index Terms: </label>PETROLEO BETUN PETROLEUM BITUMEN 
<br/><br/><label>Universal Decimal Class. No.: </label>622