Bibliography Details

“Questar Duplex ++.” Astromart, August 4, 2017. https://astromart.com/classifieds/astromart-classifieds/telescope-catadioptric/show/questar-duplex-413969.

The following is a complete listing of all citations using this source:

§ 4.2. New Accessories and Design Refinements

• Citation No. 1

Timeline

• Citation No. 2