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Reports

[Topographic maps of Usambara, corresponding to maps A - Korogwe, B - Tanga, C - Wilhelmstal and D - Moa]. 1:25,000. and 1:50,000. edited by Bernoth, Bloedhorn, Erdmann, Frost, Selke, Techmer, Wilms. Prints, pen and ink drawings, photocopies, fo...