IS : 2720 Pt XXII 1972
Bureau of Indian Standard
IS : 2720 Pt XXII 1972 - 1st - New Delhi Bureau of Indian Standard 2001 - 10
Civil Engineering
624 / BU-I
IS : 2720 Pt XXII 1972 - 1st - New Delhi Bureau of Indian Standard 2001 - 10
Civil Engineering
624 / BU-I
