Manual of testing procedures /   
Texas Highway Department. 
 - Texas :   Texas Highway Department,   196?. 
 -  anillado 
 - Soil section ;   100-E .
<br/><br/><label>Subjects--Topical Terms: </label><br/>SUELOS<br/>ENSAYOS
<br/><br/><label>Universal Decimal Class. No.: </label>624.131