TY  - BOOK
ED  - Bureau of Indian standards                                                                                                                                                                                                                                     . 
TI  - Methods of test for soils part-13   direct shear test,  IS:2720-1986 / 
U1  - 624.131 
PY  - 1987///
CY  -  : 
PB  - Bureau of Indian standards , 
ER  -