(3fXGe QjGV GdGWaGd ai GdGQOf OQGSI fXQjI hejOGfjI (B/ s - (3QfGO GdNWjHs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1991)
Keywords: (3GdfMhs; (3GdGWaGds; (3QjGV GdGWaGds; (3JYdje GdGWaGds; (3Yde GdfaS GdJQHhis; (3GdGQOfs