Soil drilling by vibration 

 - New York :   Constultants Bureau,   1961. 
 - 80 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>VIBRACIONES<br/>MECANICA DEL SUELO<br/>PERFORACIONES
<br/><br/><label>Universal Decimal Class. No.: </label>624.131.55 GUM