Edmund Scientific Catalog, 1979 fall/winter 801: : Free Download, Borrow, and Streaming : Internet Archive
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All About Telescopes (Popular Optics Library). Edmund Scientific (ES). [Paperback] by Brown, Sam: Good | GF Books, Inc.
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Amazon.com: All About Telescopes (Popular Optics Library). Edmund Scientific (ES). [Paperback]: 9780933346208: Brown, Sam
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