00289nam a2200121Ia 45000030006000000080041000060400015000471000017000622450043000792600016001225460012001380050017001500STCL150530s9999    xx            000 0 und d  aSTCLcSTCL  aPandey, G.N.  aText book of chemical technology vol-1  bVikasc1974  aEnglish20220125170259.0