Justus Perthes (Gotha) Marshall, William (1845–1907)
Neumayer, Georg Balthasar von (1826–1909) Justus Perthes (Gotha)
Drude, Oscar (1852–1933) Justus Perthes (Gotha)
Gerland, Georg (1833–1919) Berghaus, Hermann (1828–1890) Justus Perthes (Gotha)
Berghaus, Hermann (1828–1890) Zittel, Karl Alfred (1839–1904) Justus Perthes (Gotha)
Berghaus, Hermann (1828–1890) Gerland, Georg Karl Cornelius (1833–1919) Justus Perthes (Gotha)