. "1999"^^ . "De Villiers Graaff, Sir" . "1913"^^ . "De Villiers Graaff" . "De Villiers" . "Graaff" . _:Be8a1ad608ed366be97b566bd9e7d25c6 . "Graaff, De Villiers (1913-1999)" . . . . _:Be8a1ad608ed366be97b566bd9e7d25c6 . _:Be8a1ad608ed366be97b566bd9e7d25c6 . _:Be8a1ad608ed366be97b566bd9e7d25c6 "2023-05-21"^^ . _:Be8a1ad608ed366be97b566bd9e7d25c6 . _:Be8a1ad608ed366be97b566bd9e7d25c6 . _:Be8a1ad608ed366be97b566bd9e7d25c6 "29813974X" . _:Be8a1ad608ed366be97b566bd9e7d25c6 . _:Be8a1ad608ed366be97b566bd9e7d25c6 . _:Be8a1ad608ed366be97b566bd9e7d25c6 .