00282nam a2200121 a 450000500170000002000150001708200150003210000190004724500190006626000280008530000270011363000200014020251202164217.0  a0706929519  a025.1bKUM  aKumar, krishan  aLibrary manual  aDelhibVikas Pub.c1985  axii,386 p.b23 cm.cHB  aLibrary science