Letter (photocopy) from Richard P. Feynman to Robert E. Marshak, dated August 17, 1985, talking about Feynman's joint paper and relationship with Murray Gell-Mann and giving credit to E. C. George Sudarshan and Marshak for their work. Feynman is…
Letter (photocopy) from Robert E. Marshak to Richard P. Feynman thanking him for a previous letter from a conference in Kyoto, Japan, probably referring to Feynman's August 17, 1985 letter acknowledging the contributions of Feynman, Marshak, E. C.…