https://archive.org/details/hammondsfrontier00csha
Hammond's frontier atlas of the world war : containing large scale maps of all the battle fronts of Europe and Asia, together with a military map of the United States
by C.S. Hammond & Company
Published 1916
Topics World War, 1914-1918
https://archive.org/stream/hammondsfrontier00csha#page/n13/mode/1up
The world on Mercator's projection
この拡大図がこれ、チベットとチャイナの間に引かれた国境線を確認できる。
We can witness the border line between Tibet and China in this US map of 1916.
