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Mars and How to Observe It by Grego, Peter. Publication: . XIX, 238 p. 199 illus., 46 illus. in color. Availability: Copies available: AUM Main Library (1),
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Galileo and 400 Years of Telescopic Astronomy by Grego, Peter. Publication: . X, 300p. 176 illus., 22 illus. in color. Availability: Copies available: AUM Main Library (1),
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