IS : 2720 Pt XXXIX 1979
Bureau of Indian Standard
IS : 2720 Pt XXXIX 1979 - 1st - New Delhi Bureau of Indian Standard 1988 - 12
Civil Engineering
624 / BU-I
IS : 2720 Pt XXXIX 1979 - 1st - New Delhi Bureau of Indian Standard 1988 - 12
Civil Engineering
624 / BU-I
