Russian physicist (1908–1968) who won the 1962 Nobel Prize in Physics for his research into “superfluidity.” DS, in Russian, one page, 8.25 x 11.75, 1948. A “preliminary opinion” on the doctoral thesis of physicist V. Berestetsky. Countersigned by nuclear physicist Evgeny Lifshitz (1915–1985). Light wrinkling (away from text), a few tiny chips and binding pinholes, and mild toning, otherwise fine condition. R&R COA.