1
Published: Hamburg, National Geographic Deutschlandf, 2006
   
2
Published: Düsseldorf, Albatros, c 2001
   
3
   
4
Published: Leipzig, Brockhaus, 1967
   
5
   
6
Published: Hamburg, National Geographic Deutschland, 2011
   
7
Published: London, Chatham Publishing, 2004
   
10
Published: Wolfenbüttel, Melchior-Verl., 2011
   
11
   
12
   
13
Die Entdeckung und Erforschung der Erde : mit einem ABC der Entdecker und Forscher 6. Aufl., unveränd. Nachdr. der 5. Aufl., 99. - 118. Tsd
Published: Leipzig, Brockhaus, 1974
   
15
Published: Oxford [u.a.], Oxford University Press, 1993
   
16
Published: Leipzig, VEB Brockhaus, 1961
   
17
Published: Hamburg, National Geographic Deutschland (G+J/RBA), 2009
   
18
Published: Bielefeld, Delius Klasing Verlag, [2018]
   
19
Published: London [u.a.], Dent, 1984
   
20
Published: New York [u.a.], Facts on File, 1992
   

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