00379nam a2200133Ia 4500008004100000041000800041082001400049100003000063245006700093250000800160260004700168300000800215650002200223230711s9999||||xx |||||||||||||| ||und||  aENG  a624bBU-I  aBureau of Indian Standard 0aSI : SP 20 1991bHandbook of measuring design and construction  a1st  c1991aNew DelhibBureau of Indian Standard  a150  aCivil Engineering