1.

図書
図書
1. Report on the relativity theory of gravitation. [2nd ed.]
by A.S. Eddington
出版情報: London : Fleetway Press, 1920
2.

図書
図書
2. Space, time and gravitation : an outline of the general relativity theory
by A.S. Eddington
出版情報: Cambridge : Cambridge University Press, 1920