(3EHdjS aj GdJMdjd GdfaSj (B/ s - (3aQhjO, SjLehfOs; (3WQGHjTj, LhQLs ((3HjQhJ (B:s (3OGQ GdWdjYI,s, 1980)
Keywords: (3Yde GdfaSs; (3GdJMdjd GdfaSjs