1. Sovereignty and mandate boundary lines in 1921 of the islands of the Pacific Maps University Of Minnesota Public content 1921. National Geographic Society (U.S.). Map Department. Issued with the National Geographic magazine, volume 40, no. 6, Dec. 1921. 46 x 61 centimeters Scale 1:22,375,000 General Map Collection. The Society (Washington, D.C), 1921.