by C. L. Siegel ; Translated from the original German by A. Shenitzer [and others] by C. L. Siegel ; Translated from the original German by E. Gottschling [and others] Manfred Weck ; translated from the original German by H. Bibring. K. Muller ; English translation from the original German by M. R. F. Ashworth. K. Zinner ; translated from the German by G. Winkler.