Questar 20-40

Introduction of the Questar 20-40.

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Questar advertisement, <em>Scientific American</em>, March 1976 — Questar advertisement, *Scientific American*, March 1976. Questar Corporation

Scientific American, October 1975, 137.
Scientific American, November 1975, 14.
Scientific American, December 1975, 113.
Scientific American, March 1976, 21.
Scientific American, July 1976, 131.
Scientific American, May 1977, 148.

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Questar advertisement, <em>Industrial Research</em>, April 1976 — Questar advertisement, *Industrial Research*, April 1976. Questar Corporation via archive.org

Industrial Research (Industrial Research & Development), October 1975, 102.
Industrial Research (Industrial Research & Development), November 1975, 24.
Industrial Research (Industrial Research & Development), February 1976, 130.
Industrial Research (Industrial Research & Development), April 1976, 42.
Industrial Research (Industrial Research & Development), September 1976, 110.