Astronomy: the open air observatory at Peking. Halftone after E.N.A..
- Reference:
- 46267i
Licence: Public Domain Mark
Credit: Astronomy: the open air observatory at Peking. Halftone after E.N.A.. Wellcome Collection. Source: Wellcome Collection.
Licence: Public Domain Mark
Credit: Astronomy: the open air observatory at Peking. Halftone after E.N.A.. Wellcome Collection. Source: Wellcome Collection.