Schnell, P.
Frobenius, Leo
Barth, Hermann von
Buxton, Thomas Fowell
Baker, Samuel White
Zucchelli, Antonio
Meyer, Hans Heinrich Josef
Volkens, Georg
Johnston, Harry Hamilton
Stanley, Henry Morton
Kolb, Hugo
Marquardsen, Hugo
Savoyen, Ludwig Amadeus von
Baumann, Oscar
Buchta, Richard
