BUREAU OF INDIAN STANDARDS <br/><br/>
IS: 2720(PPART 39/sec1)-1977; Methods of test for soils part XXXIX: Direct shear test for soils containing gravel section 1 laboratory test 

 - NEW DELHI  BIS  1978 
 - 14p 
<br/><br/><label>Universal Decimal Class. No.: </label> /