(3ETcGdjGJ GdSdWI h GdMQjI (B/s - (3YHO Gddg gOjgs ([(3ecGf GdfTQ ZjQ eYQha(B]s [(3GSe GdfGTQ ZjQ eYQha(B]s, 1981)
(3jTJed Ydj GQLGYGJ HHdjhLQGajIs
Keywords: (3GdbGfhf GdOSJhQjs