(3eONd Gdi GdQhGjI GdGfcdjRjI (B/s - (3GdQGgH, gGfj s ([(3Ohf ecGf(B] :s (3hRGQI GdKbGaI h GdGQTGO Gdbhej ,s, 1977)
Keywords: (3GdQhGjI s; (3GdGfcdjRjI s; (3eONd s