Hartwig, G. (1869). The Polar World: A popular description of Man and nature in the Arctic and Antarctic regions of the globe. By Dr. G. Hartwig. With eight chromoxylographic plates, three maps, and numerous woodcuts (1a. ed.). Longmans, Green, and Co.
Tohutoru Kātū Chicago (17th ed.)Hartwig, G. The Polar World: A Popular Description of Man and Nature in the Arctic and Antarctic Regions of the Globe. By Dr. G. Hartwig. With Eight Chromoxylographic Plates, Three Maps, and Numerous Woodcuts. 1a. ed. Londres: Longmans, Green, and Co, 1869.
Tohutoro MLA (9th ed.)Hartwig, G. The Polar World: A Popular Description of Man and Nature in the Arctic and Antarctic Regions of the Globe. By Dr. G. Hartwig. With Eight Chromoxylographic Plates, Three Maps, and Numerous Woodcuts. 1a. ed. Longmans, Green, and Co, 1869.