General conditions in Kaiser-Wilhelms-Land and the Bismarck Archipelago. - Administration, social, economic and political development, local population, punitive expeditions, scientific expeditions: Volume 12
General conditions in Kaiser-Wilhelms-Land and the Bismarck Archipelago. - Administration, social, economic and political development, local population, punitive expeditions, scientific expeditions: Volume 20
General conditions in Kaiser-Wilhelms-Land and the Bismarck Archipelago. - Administration, social, economic and political development, local population, punitive expeditions, scientific expeditions: Volume 21
General conditions in Kaiser-Wilhelms-Land and the Bismarck Archipelago. - Administration, social, economic and political development, local population, punitive expeditions, scientific expeditions: vol. 1
General conditions in Kaiser-Wilhelms-Land and the Bismarck Archipelago. - Administration, social, economic and political development, local population, punitive expeditions, scientific expeditions: vol. 10
General conditions in Kaiser-Wilhelms-Land and the Bismarck Archipelago. - Administration, social, economic and political development, local population, punitive expeditions, scientific expeditions: vol. 11
General conditions in Kaiser-Wilhelms-Land and the Bismarck Archipelago. - Administration, social, economic and political development, local population, punitive expeditions, scientific expeditions: vol. 13
General conditions in Kaiser-Wilhelms-Land and the Bismarck Archipelago. - Administration, social, economic and political development, local population, punitive expeditions, scientific expeditions: vol. 14
General conditions in Kaiser-Wilhelms-Land and the Bismarck Archipelago. - Administration, social, economic and political development, local population, punitive expeditions, scientific expeditions: vol. 15