(3GdfHhZ GdeZQHi ai GdGOH GdYQHi L(B2 / s - (3YHOGddg cfhf GdMSjfis ([S.N] : (3ecJHI GdeOQSI hOGQ GdcJGH GddHfGfi , s, 1975)
Keywords: (3GdGOH GdYQHis; (3GdGOH GdYQHi (B- (3GdeZQHs