1. Busse, F. H.: 1971, Private communication.
2. Cha, M. and White, O. R.: 1971, Private communication.
3. Deubner, F.-L.: 1971, Solar Phys. 17, 6.
4. Deubner, F.-L. and Hayashi, N.: 1972, in preparation.
5. Dunn, R. B.: 1971, in R. Howard (ed.) ?Solar Magnetic Fields?, IAU Symp. 43, 63.