(3SdjeGf GdbGfhfi(B, (3eKd ef GdfeGRL Hjf GdghjI hGdMOGKI (B/ s - (3cdh(B, (3GfOQis; (3GdHTjQ Hf SdGeI (B((3JYQjH(B)s ([S.N] : (3OGQ GdLjd , s, 1991)
Keywords: (3JGQjNs; (3GdSdGWjfs