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  1. By: Koenigsberger, Leo,
    Publication info: Leipzig B.G. Teubner 1896
    Holding Institution: University of Toronto - Gerstein Science Information Centre
    Subjects: 1821-1894  Helmholtz, Hermann von,  
  2. By: McKendrick, John Gray,
    Publication info: New York, Longmans, Green & Co, 1899
    Holding Institution: University of California Libraries
    Subjects: 1821-1894  Helmholtz, Hermann von,  
  3. By: Koenigsberger, Leo, - Koenigsberger, Leo, - Welby, Frances A. (Frances Alice)
    Publication info: Oxford, Clarendon press, 1906
    Holding Institution: University of California Libraries
    Subjects: 1821-1894  Helmholtz, Hermann von,  
  4. By: Koenigsberger, Leo, - Welby, Frances A. (Frances Alice)
    Publication info: Oxford, Clarendon Press, 1906
    Holding Institution: University of Toronto - Gerstein Science Information Centre
    Subjects: 1821-1894  Helmholtz, Hermann von,