IS : 2720 Pt XXIII 1976
Bureau of Indian Standard
IS : 2720 Pt XXIII 1976 - 1st - New Delhi Bureau of Indian Standard 1976 - 6
Civil Engineering
624 / BU-I
IS : 2720 Pt XXIII 1976 - 1st - New Delhi Bureau of Indian Standard 1976 - 6
Civil Engineering
624 / BU-I
