(3LQjeJG bJd aj TGQY ehRY (B/ s - (3Hh, GOZGQ GdGfs; (3MSf, egG eMeOs ((3HZOGO (B:s (3hRGQI GdKbGaI h GdEYdGe,s, 1989)
Keywords: (3COH GdCWaGds; (3fGTFhf cHGQ (B( 15 - 18 (3SfI (B)s