Scientific Requirements for Extremely Large Telescopes (IAU S232) (Proceedings of the International Astronomical Union Symposia and Colloquia): Whitelock, Patricia Ann, Dennefeld, Michel, Leibundgut, Bruno: 9780521856089: Amazon.com: Books
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Amazon.com : Astronomical Telescopes + Travel Monocular Telescope Scope 70mm Aperture 400mm AZ Mount Astronomical Refractor Telescopes for Kids Adults Beginners - Portable Bag, Smartphone Adapter, Camera Remote : Camera & Photo