Henry Draper memorial :
first-[fourth] annual report of the photographic study of stellar spectra /
conducted at the Harvard College Observatory, Edward C. Pickering, director.
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Viewability
Item Link | Original Source |
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Full view | Princeton University |
Full view | University of California |
Full view v. 1-3 | University of California |
Full view v. 1-3 | University of California |
Full view v.1-4 | Columbia University |