经常下载主要类别阅读书单中文电子书 AI阅读

经常下载主要类别

Books by Pickering, Edward C. (Edward Charles)

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History of the Harvard College Observatory During the Period 1840-1890 Daniel W. Baker May 30, 2019
A Plan for Securing Observations of the Variable Stars Edward C. Pickering Mar 19, 2011
The Future of Astronomy Edward C. Pickering Apr 17, 2005
Displaying results 1–3