Kovacs, William D. <br/><br/>
Energy measurement in the standard penetration test / 
William D. Kovacs, Lawrence A. Salomone, Felix Y. Yokel 
 - Washington, D.C :  United States Government Printing Office,  1981 
 - 10 p. ;  25 cm. 
 - NBS building science series ;  135 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>News digest
<br/><br/><label>Dewey Class. No.: </label>631.4