(3cJGH GdWjHGJ ef GdQRb (B/ s - (3GHi PQ GdJdePis ([S.N] : (3ecJHI GdJQGK GdGSdGei , s, 1991)
Keywords: (3Gdabg GdGSdGeis; (3GdeLGgOGJ hGdeYGedGJs