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Periodical

Easy and Effective Light Barriers.

Source: Sky & Telescope. Oct2018, Vol. 136 Issue 4, p72-73. 2p. 4 Color Photographs.

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Periodical

A Gentleman's Observatory.

Authors : Wetherell, Tim

Source: Sky & Telescope. Oct2017, Vol. 134 Issue 4, p30-33. 4p.

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