(3CHh aQGS GdMeOGfj (B: s (3OQGSI aj GdTYQ h GdJGQjN (B/ s - (3ZQjH, LhQLs ((3HjQhJ (B:s (3OGQ GdKbGaI,s, 1975)
Keywords: (3GdTYQ GdYHGSjs; (3JGQjN h fbOs