- Kalmbach Publishing Co. - Publisher of Astronomy magazine and other astronomy products.
- Willmann-Bell, Inc. - Publishers and booksellers serving astronomers worldwide since 1973. On-line catalog and ordering.
- Cosmobrain Astronomy Bookstore - Online astronomical bookstore including over 500 selected titles divided by subject. Worldwide shipping. Safe shopping guarantee.
- Sky and Telescope - Publisher of Sky & Telescope magazine and a variety of astronomy books, software, star atlases, observing guides and related products.
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