00329nam a2200133Ia 4500008004100000041000800041082001400049100003000063245001800093250000800111260004700119300000700166650002200173230711s9999||||xx |||||||||||||| ||und|| aENG a624bBU-I aBureau of Indian Standard 0aIS : 516 1959 a1st c1959aNew DelhibBureau of Indian Standard a24 aCivil Engineering