IS : 2720 Pt XXXIII 1971
Bureau of Indian Standard
IS : 2720 Pt XXXIII 1971 - 4th - New Delhi Bureau of Indian Standard 2001 - 11
Civil Engineering
624 / BU-I
IS : 2720 Pt XXXIII 1971 - 4th - New Delhi Bureau of Indian Standard 2001 - 11
Civil Engineering
624 / BU-I
