File:Practical astronomy (IA practicalastrono00michrich).pdf
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1930.
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Category:1915 texts
Category:Artworks digital representation of unclassified work
Category:Books about astronomy
Category:Books from New York (state)
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Category:Practical astronomy (1915, John Wiley & Sons)
Category:Scans from the Internet Archive
Category:Scans from the Internet Archive/unverified
Category:Template Unknown (author)