1. Baliunas, S. L. and Vaughan, A. H.: 1985,Ann. Rev. Astron. Astrophys. 23, 379.
2. Baliunas, S. L.et al.: 1993, in preparation.
3. Beckers, J. M., Bridges, C. A., and Gilliam, L. B.: 1976,A High Resolution Spectral Atlas of the Solar Irradiance from 380 to 700 nanometers, AFGL-TR-76-126(I).
4. Bogart, R. S.: 1982,Solar Phys. 76, 155.
5. Dobson, A. K., Donahue, R. A., Radick, R. R., and Kadlec, K. L.: 1990, inThe Sixth Cambridge Symposium on Cool Stars, Stellar Systems and the Sun, PASP Conference Series, No. 9, 132.