00305nam a2200121Ia 4500008004100000041000800041082001300049100001300062245004100075260004000116300001200156700001500168220530s9999    xx            000 0 und d  aeng  a540bDAR  aDara S S  aA Text Book of Engineering Chemistry  aNew DelhibS Chand Publishersc2010  a972bPB  a Unare S S