MERMIN, Nathaniel David. & Manfred H. Wagner. Absence of Ferromagnetism or Antiferromagnetism in One- or Two-Dimensional Isotropic Heisenberg Models.
Lancaster: American Physical Society, 1966. First edition.

In: Physical Review Letters, Vol. 17, pp.1133-36 and p.1307. The two complete single issues offrered in the original printed wrappers. 4to: 266x200 mm. A little browning to the second issue. Rubber stamp and address label of former owner. In all very good copies.