TY  - BOOK
AU  - Bureau of Indian Standards[BIS]
TI  - IS:2720-(Pt.39/Sec.1)-1977. Indian standard methods of test for soils. Pt.39 : direct shear test for soils containing gravel. Sec.1 : laboratory test
U1  - IS Code 
PY  - 1989///
CY  - New Delhi
PB  - Bureau of Indian Standards
N1  - ENG
ER  -