000 00318nam a2200145Ia 4500
008 220421s9999||||xx |||||||||||||| ||und||
020 _c495/-
040 _aET
100 _aDARA S S
245 0 _aENGINEERING CHEMISTRY
260 _bS.CHAND & COMPANY
_aNEW DELHI
300 _a972
500 _a20725
942 _cBK
999 _c26940
_d26940