Book reviews van Wijngaarden, L. ; Zandbergen, P. J. ; Slachmuylders, E. ; de Graaff, W. ; Vandenkerckhove, J. ; van Herk, G. ; de Jager, C. Abstract Publication: Space Science Reviews Pub Date: October 1967 DOI: 10.1007/BF00215607 Bibcode: 1967SSRv....7..396V