00399nam a2200133Ia 4500008004100000041000800041082001400049100003000063245008400093250000800177260004700185300000600232650002700238230711s9999||||xx |||||||||||||| ||und||  aENG  a666bBU-I  aBureau of Indian Standard 0aSI : 6441 Pt IVbMethod of test for autoclaved cellular concrete products Pt-IV  a1st  c1972aNew DelhibBureau of Indian Standard  a7  aMechanical Engineering