1. Balogh, A. and Hynds, R. J.: 1970, in Intercorrelated Satellite Observations Related to Solar Events (ed. by V. Manno and D. E. Page), D. Reidel Publ. Comp., Dordrecht, Holland, p. 471.
2. Elliot, H.: 1970, ?Particle Diffusion in the Solar Corona?, International Symposium on Solar Terrestrial Physics, Leningrad.
3. Fan, C. Y., Pick, M., Pyle, R., Simpson, J. A., and Smith, D. R.: 1968, J. Geophys. Res. 73, 1555.
4. Forman, M. A.: 1970, J. Geophys. Res. 75, 3147.
5. Forman, M. A.: 1971, J. Geophys. Res. (in press).