Principles of mathematical logic - Hilbert, David, 1862-1943.; Ackermann, W. (Wilhelm), 1896- (New York : Chelsea Pub. Co., 1950)
"Published and distributed in the public interest by authority of the Attorney General under licence no. A-1428."
Translation of the 2d ed. of the authors' Grundzüge der theoretischen Logik, published in 1938."
Bibliography: p. 169-170.
Keywords: Logic, Symbolic and mathematical