- Petermann, August Heinrich; Hassenstein, Bruno
- University of Illinois at Urbana-Champaign, University Library
43.2 x 52.4 cm. 1:2,000,000. Relief shown by hachures. Explorers' routes indicated by color. Hand colored. Lithography.
- Wadai (Sultanate)
Bagirmi (African people)
Central African Republic--Discovery and exploration, European
Chad--Discovery and exploration, European
Roads and trails
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