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Peter (1999), Unusual Telescopes, Cambridge University Press, p. 91, ISBN 0-521-48393-X Portals: Astronomy Stars Spaceflight Outer space Solar System...3 KB (360 words) - 08:42, 24 June 2023
Unusual Telescopes. Cambridge University Press, 1995, p. 77. ISBN 0-521-48393-X Joseph L. Spadley. "The First True Radio Telescope". Sky and Telescope...16 KB (1,774 words) - 07:37, 22 June 2024- Telescopes (pbk ed.). Cambridge University Press. pp. 136–137. ISBN 0-521-48393-X. Fundingsland, John O. (August 1992). "Easy viewing with a fixed telescope"...6 KB (925 words) - 12:34, 10 September 2023
(1995). Unusual telescopes. Cambridge University Press. p. 182. ISBN 0-521-48393-X. Pendergrast, Mark (2003). Mirror mirror. Basic Books. p. 96. ISBN 9780465054701...26 KB (2,408 words) - 08:48, 13 June 2024
