1. Coronal background variations observed in solar 1-8A X ray flux measurements (abstract);Bouwer;Eos Trans. AGU.,1981
2. Solar variability during several years of solar cycle 21 at coronal, chromospheric and photospheric wavelengths;Bouwer,1982
3. A summary of solar 1-8A measurements from the SMS and GOES satellites, 1977–1981;Bouwer,1982
4. Comparison of nonflare solar soft X ray flux with 10.7 cm radio flux;Donnelly;J. Geophys. Res.,1982
5. Solar X-ray measurements from SMS-1, SMS-2 and GOES-1, information for data users;Donnelly,1977