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Time and space, weight and inertia : a chronogeometrical introduction to Einstein's theory
Fokker, A. D.
Bok Engelsk 1965
Solar activity for the IQSY
M.A. Ellison. Recording of solar radio em...
Bok Engelsk 1963
The behaviour of tops and of the tippetop : three papers
Fokker, A. D.
Bok Engelsk 1953