(3VO GdXdGejI (B:s (3GdGJLGg GdESdGej MQcI fgVI(B..(3Ce MQcI GfMWGW ? (B/s - (3GdgeGMj, MeIs ([(3Ohf ecGf(B] :s [(3Ohf fGTQ(B] (3,s, 1989)
Keywords: (3GdESdGes; (3MQcI GdfgVIs