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The Draper Catalogue of Stellar Spectra: Photographed With the 8-Inch Bache Telescope as Part of the Henry Draper Memorial (Classic Reprint): Harvard College Observatory: 9781333243197: Amazon.com: Books
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The Draper Catalogue of Stellar Spectra: Photographed With the 8-Inch Bache Telescope as Part of the Henry Draper Memorial (Classic Reprint): Harvard College Observatory: 9780265958445: Amazon.com: Books
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