"Theory of Fermi Interaction", in Physical Review, January 1, 1958

FEYNMAN, R.P. and Murray Gell-Mann. "Theory of Fermi Interaction", in "Physical Review", January 1, 1958, volume 109 number 1, pp 193-198, in the issue of pp 1-226.  This is copy removed from a larger bound volume, but with the original wrappers, with a rubber stamp of the National Bureau of Standards.  Very fresh and crisp copy, and otherwise in fine condition. __+__ "Around the same time, Murray Gell-Mann--Feynman's younger colleague and friendly rival at Caltech--arrived at the same conclusion. Rather than see his two star theorists devolve into a messy priority dispute, Caltech's physics department chair, Robert Bacher, wisely suggested that Feynman and Gell-Mann publish an article together. Their paper, titled "Theory of the Fermi Interaction", arrived at "Physical Review" in September 1957, just days before another pair of theorists the University of Rochester's Robert Marshak and his graduate student, E. C. George Sudarshan presented a similar theory at a conference in Italy. (In fact, Marshak and Sudarshan had visited with Gell-Mann in California a few months earlier, while Feynman was vacationing in Brazil.) Feynman often considered this work to be his greatest success: for the first time, he had discovered a genuine law of nature." --Complete Dictionary Scientific Biography, online.