(3GdJWhQ GdSjGSj GdeYGUQ aj GdYQGb (B/s - (3hejV LeGd YeQ fXejs; (3ZGfe eMeO UGdMs; (3Tajb YHO GdQGRb s ([(3ecGf GdfTQ ZjQ eYQha(B]s [(3CSe GdfGTQ ZjQ eYQha(B]s, 1975)
. 408-405(3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU CZdHg HGddZI GdYQHjI HYV GdfUhU GdEfLdjRjI hGdaQfSjIs
Keywords: (3GdbGfhf GdOSJhQjs