Henry A. Rowland: XIV. On magnetic permeability, and the maximum of magnetism of iron, steel, and nickel. In: The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. Band46, Nr.304, 1. August 1873, ISSN1941-5982, S.140–159, doi:10.1080/14786447308640912.
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Henry A. Rowland: XIV. On magnetic permeability, and the maximum of magnetism of iron, steel, and nickel. In: The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. Band46, Nr.304, 1. August 1873, ISSN1941-5982, S.140–159, doi:10.1080/14786447308640912.