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How to Choose Eyepieces for Your Astronomy Telescope
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Contributions from the Osborn Botanical Laboratory. Plants. 512 HENRY LAURENS AND HENRY D. HOOKER, JR. box is open and holes are bored in the top and bottom for ventilation. The light-box
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Refracting Telescopes - an overview | ScienceDirect Topics
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Simple Formulas for the Telescope Owner - Sky & Telescope - Sky & Telescope
