Solar-Terrestrial Physics/1970: Proceedings of the ...
International Symposium on Solar-Terrestial Physic
Hess, W. N., Canfield, E. H., and Lingenfelter, R. E.: 1961, Cosmic Ray Neutron Demography', J. Geophys. Res. 66,665. Hoffman, R. A. and Bracken, P. A.: 1965, 'Magnetic Effects of the Quiet-Time Proton Belt”, J. Geophys. Res. 70,3541. Imhof ...