Picryl description: Public domain illustrated travel, exploration, and geography book page scan, free to use, no copyright restrictions image.
Public domain history book page scan, free to use, no copyright restrictions image - Picryl description
Shows southern boundary of continuous permafrost ground and Northwest Passage/Northern Sea Route. "78635 7-70." North Pole at map center. Vertical meridian at 100°W/80°E. Available also through the Library of C More