Richard a Proctor
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Half-Hours With the Stars: A Plain and Easy Guide to the Knowledge of the Constellations
Proctor, Richard Anthony
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Myths and Marvels of Astronomy
Proctor, Richard A. Proctor
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Half-Hours With The Telescope: Being A Popular Guide To The Use Of The Telescope As A Means Of Amusement And Instruction
Proctor, Richard A
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Other Worlds Than Ours: The Plurality of Worlds Studied Under the Light of Recent Scientific Researches
Proctor, Richard Anthony
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Transits of Venus: A Popular Account of Past and Coming Transits From the First Observed by Horrocks 1639 to the Transit of 2012, Also an Account of ... the Transit of 1882 (Classic Reprint)
Richard A. Proctor
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Easy Lessons in the Differential Calculus: Indicating from the Outset the Utility of the Processes Called Differentiation and Integration - Primary So
Proctor, Richard Anthony
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Easy Star Lessons
Proctor, Richard Anthony
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