(3ehLR GdEbJUGO GdOhdi (B/0s - (3QGHM QJjH s ([(3ecGf GdfTQ ZjQ eMOO(B] :s [(3GdfGTQ ZjQ eMOO(B],s, 1991)
251-270 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdGbJUGO GdOhdis