Questar Advertisements by Year and Month
Abbreviations: AC: American Cinematographer; Adbn: Audubon; AP: American Photographer; ASFF: Analog Science Fiction and Fact; Astro: Astronomy; BB: British Birds; BC: Biomedical Communications; BW: Business Week; C35: Camera 35; CC: Construction Contracting; CE: Catholic Educator; DS: Deep Sky; ExU: Explore the Universe; Hldy: Holiday; IA: Iron Age; IR&D: Industrial Research & Development; LO: Lasers & Optronics; MP: Modern Photography; MTR: MIT Technology Review; Natr: Nature; NH: Natural History; NR: National Review; NTB: NASA Tech Briefs; PP: Petersen’s Photographic; Ptrm: Planetarium; RPA: Review of Popular Astronomy; S&T: Sky and Telescope; SA: Scientific American; Sci80: Science 80; SciT: Science Teacher; SD: Science Digest; Smsn: Smithsonian; SN: Science News.
See also this aggregation of Questar advertisements by publication.