00339nam a2200133Ia 4500008004100000041000800041082001400049100003000063245002800093250000800121260004700129300000700176650002200183230711s9999||||xx |||||||||||||| ||und||  aENG  a624bBU-I  aBureau of Indian Standard 0aIS : 2720 Pt XXXIX 1979  a1st  c1988aNew DelhibBureau of Indian Standard  a12  aCivil Engineering