(3gQhH GdYGFdI GdebOSI(B(23 (3ObjbI(B) / s - (3MSf GdJdeSGfi (B((3eUhQ(B)s; (3hdi GdOjf SGeMs ([S.N] : (3GdeQcR Gdbhei ddSjfeG , s, 1961)
Keywords: (3TQGFW ajOjhs; (3GadGe JSLjdjIs