TY  - BOOK
ED  - Indian standards institution                                                                                                                                                                                                                                   . 
TI  - Method of determination of modulus of subgrade reaction ( K-value)of soils in field   9214-1979 / 
U1  - 624.131 
PY  - 1980///
CY  - New Delhi : 
PB  - Indian standards institution , 
ER  -