00457nam a22001457a 4500 SGT 540,CHA CHAWLA,SHASHI A.T.BOOK OF ENGINEERING CHEMISTRY NEW DELHI DHANPAT RAI 2010 V.P CHEMISTRY & ALLIED SCIENCES POLYMERS & POLYMERIZATION,PLASTICS,ELASTOMERS,PETROLEUM AND PETROCHEMICALS,FUELS,WATER TREATMENT,LUBRICANTS,CEMENTS,DYES AND DYING ddc FCM 9246 9246