1. Anderson, K. A.: 1965, J. Geophys. Res.
70, 4741.
2. Anderson, K. A., Harris, H. K., and Paoli, R. J.: 1965, J. Geophys. Res.
70, 1039.
3. Bame, S. J.: 1968, in Earth’s Particles and Fields (ed. by B. M. McCormac), Reinhold Publishing Corporation, New York, p. 373.
4. Blanchard, R. C. and Hess, W. N.: 1964, J. Geophys. Res.
69, 3927.
5. Bostrom, C. O., Beali, D. S., and Armstrong, J. C.: 1968, Paper presented at International Symposium on the Physics of the Magnetosphere.