(3cJGH GdJhHI (B/s - (3GHf bje GdLhRjI, eMeO Hf CHj HcQ Hf CjhHs 691-751 (3gLQj(B.s; (3GdHWGhj, UGHQ CMeOs ((3GdbGg`QI (B:s (3ecJHI GdSfI,s, 1990)
Keywords: (3GdJhHIs; (3GdhYX hGdEQTGOs; (3GdOYhI GdESdGejIs