(3GdeZfi ai GHhGH GdJhMjO hGdYOd(B:s (3Ndb GdbQGf (B/ s - (3GdgePGfi, GHh GdMSf YHOGdLHGQ Hf GMeO Hf YHOGdLHGQ Hf GMeO GdGSO GHGOis; (3Wg MSjfs; (3GHQGgje GdGHjGQis ([S.N] : (3hRGQI GdKbGaI hGdGQTGO Gdbhei , s, 1961)
Keywords: (3GdJhMjOs; (3GdYOds; (3Yde GdcdGes; (3GdbQGf (B- (3Ndbs