"Theory of a Superfluid Fermi Liquid. I. General Formalism and Static Properties" AND "Interpretation of Recent Results on He3 below 3 mk: a new Liquid Phase?":

In THE PHYSICAL REVIEW, Second series, vol. 140, N. 6A, 13 december 1965, pp. 1869-1888, and THE PHYSICAL REVIEW LETTERS, Vol. 29, N. 18, 30 October 1972, PP. 1227-1230, two entire numbers in original printed wrappers.Very good copies, ownership inscriptions, spine of vol 140 with a small rupture. FIRST EDITIONS. " Anthony Leggett’s complete theory for atomic pairing in a superfluid won him one third of the 2003 Nobel Prize in Physics.Part of this year’s physics Nobel prize went to Anthony Leggett of the University of Illinois at Urbana-Champaign for his work on superfluid helium. A superfluid flows without any viscosity or resistance and has other exceptional properties. In 1965 Leggett formulated a theory of the superfluid phase in helium-3–the rare isotope of helium–in the Physical Review. Seven years later, just weeks after the discovery of the superfluid, he extended his analysis in a PRL paper and precisely identified the state that was seen in the new data. Leggett’s theory has been borrowed in many areas of physics, including models of phase transitions in the very early universe." ( https://physics.aps.org/story/v12/st16). Offered with Erratum of P.R.L. 29, in Phys. Rev. Lett. 30, 411 (1973).