Pisgah Astronomical Research Institute (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pisgah Astronomical Research Institute" in English language version.

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harvard.edu

Osborn, Wayne; Robbins, Lee (2009), Preserving Astronomy's Photographic Legacy: Current State and the Future of North American Astronomical Plates, Astronomical Society of the Pacific Conference Series, vol. 410, San Francisco: Astronomical Society of the Pacific, pp. 153–159, Bibcode:2009ASPC..410.....O, ISBN 978-1-58381-700-1

"Rosman Tracks on to the End" (PDF), Cryptologic Almanac, National Security Agency – Center for Cryptologic History, August 1996, archived from the original (PDF) on 2013-09-18

"Rosman Tracks on to the End" (PDF), Cryptologic Almanac, National Security Agency – Center for Cryptologic History, August 1996, archived from the original (PDF) on 2013-09-18