(3eSLO GdSdWGf MSf (B/ s - (3MSjf GdWjH (B((3eNQL(B)s; (3Ydi GdZRhdi (B((3eUhQ(B)s ([S.N] : (3GdeQcR Gdbhei ddSjfeG , s, 1980)
Keywords: (3TQGFW ajOjhs; (3GadGe JSLjdjIs