(3GdehShY aj GdCOH GdYQHj (B- ( 21 ) - (3GdYQH aj GdCfOdSs - (3ZQjH(B. (3LhQLs ((3OGQ GdKbGaIs (3HjQhJs, 1978)
Keywords: (3GdCOH GdYQHj (B- (3GdCfOdS s; (3GdCOH GdYQHj (B- (3efhYGJ s