Burnt clay or surkhi, as pozzolana
Khan, C.A.R.
Burnt clay or surkhi, as pozzolana - Simla 1941 - 1-53 p. - Simla of Indian Industrial Re .
Burnt clay or surkhi, as pozzolana - Simla 1941 - 1-53 p. - Simla of Indian Industrial Re .