1958, London, Routledge & Kegan Paul. 8ºM, 22x15cm, 272p. Tela grabada en muy buen estado, ligeramente tostada. Con sobrecubierta ilustrada, sucia y tostada, en buen estado general. Revised. With a new apenndix. «The book is a new manual of logical method, but the last five sections deal with set theory and the foundation of mathematics. It is intended for students, but «the book would fail of much of its purpose», the author writes, «if it were not also taken up as a treatise by readers who have no commitments to a college logic course».