Schetskaart van het terrein doorloopen bij de excursie in 1890 tegen de Battaksche landschappen Loemban-Pinasa en Djandji
1891
Indonesia
Map of an expedition route—in red—through the country of the Batak people of northern Sumatra, from Lake Toba to Loemban-Pinasa (Lumban Pinasa) and Djandji. Mountains and forests are shown, along with two drawings of views of hills.
