(3QSGFd GHf QTO GdWHjI (B/ s - (3LhQL TMGJI bfhGJis; (3SYO RGjOs; (3GHQGgje eOchQs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1987)
Keywords: (3JGQjNs; (3GdWHs