[Congo] Thonner, F. Vom Kongo zum Ubangi Meine zweite Reise in Mittelafrika. Berlin, D. Reimer, 1910. XI,116 p. 20 b/w in-text ills., 114 collotypes (most of indigenous peoples) and 3 fold. lithogr. maps. Orig. dec. cl. 8vo. Covers and spine sl. worn, some browning as usual. The Austrian botanist Thonner (1863-1928) undertook his second African expedition, described in this publication, between 1908 and 1910.

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