(3GdTQb GdChSW aj GdTDhf GdeGdjI s - (3dfKhaScj, LhQL s; (3LYaQ NjGW s ((3HZOGO (B:s (3ecJHI OGQ GdeJfHj (B,s, 1960)
. 240-220 (3HHdjhLQGajG(B: (3UaMGJ(B.s
Keywords: (3GdSjGSI GdGbJUGOjI s