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2014‑09‑11 – The character of physical law: Feynman's Messenger Lectures at Cornell, 1964.

• 2014‑09‑11 - The character of physical law: Feynman's Messenger Lectures at Cornell, 1964.
• http://www.openculture.com/2012/08/the_character_of_physical_law_richard_feynmans_legendary_lecture_series_at_cornell_1964.html
• redirect https://dotat.at/:/78ZLM
• blurb https://dotat.at/:/78ZLM.html
• atom entry https://dotat.at/:/78ZLM.atom
• web.archive.org archive.today