هرمان فون هلمهولتز: تفاوت میان نسخه‌ها

* «[http://books.google.com/books?vid=0CZkDzy7hqYWpJVqcWCZAHZ&id=5aUOAAAAIAAJ&pg=PT17 Hermann von Helmholtz]»" (Obituary). Royal Society (Great Britain). (1894). Proceedings of the Royal Society of London. London: Printed by Taylor and Francis.

* «[http://www.archive.org/details/hermannvonhelmho00koenrich Hermann von Helmholtz]»" by Leo Koenigsberger (Oxford: Clarendon press, 1906) from [[بایگانی اینترنتی]]

* ''[http://www.bartleby.com/30/125.html On the Conservation of Force]'' Introduction to a Series of Lectures Delivered at Carlsruhe in the Winter of ۱۸۶۲–۱۸۶۳،1862–1863, English translation

* ''[http://www.psych.upenn.edu/backuslab/helmholtz/index.html Treatise on Physiological Optics]'' ۱۹۱۰،1910, three volumes. English translation by Optical Society of America (۱۹۲۴–۵).