00329nam a2200133Ia 4500008004100000041000800041082001300049100003000062245001900092250000800111260004700119300000700166650002200173230711s9999||||xx |||||||||||||| ||und|| aENG a624bBU- aBureau of Indian Standard 0aIS : 9556 1980 a1st c1980aNew DelhibBureau of Indian Standard a24 aCivil Engineering