00253nam a22001097a 4500020001500000082001500015100002800030245003100058250000600089260004000095300000800135  a8170413494  a547.86/TYA  aTYAGI, O. D./ YADAV, M.  aTEXTBOOK OF SYNTHETIC DYES  a1  aNEW DELHIbANMOL PUBLICATIONSc1993  a304