John C. Shedd and Mayo D. Hershey,"The History of Ohm's Law", Popular Science, December 1913, pages 599-614, Bonnier Corporation ISSN 0161-7370, gives the history of Ohm's investigations, prior work, Ohm's false equation in the first paper, illustration of Ohm's experimental apparatus.
Kirchhoff, Gustav (1860). „Ueber die Fraunhoferschen Linien”. Monatsberichte der Königliche Preussische Akademie der Wissenschaften zu Berlin: 662–665. ISBN978-1-113-39933-5.HathiTrust full text. Partial English translation available in Magie, William Francis, A Source Book in Physics (1963). Cambridge: Harvard UP. p. 354-360.
Morton L. Schagrin, "Resistance to Ohm's Law", American Journal of Physics, July 1963, Volume 31, Issue 7, pp. 536-47. Explores the conceptual change underlying Ohm's experimental work.
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Kirchhoff, Gustav (1860). „Ueber die Fraunhoferschen Linien”. Monatsberichte der Königliche Preussische Akademie der Wissenschaften zu Berlin: 662–665. ISBN978-1-113-39933-5.HathiTrust full text. Partial English translation available in Magie, William Francis, A Source Book in Physics (1963). Cambridge: Harvard UP. p. 354-360.