1931
Quoted in The New Yorker
Parker, Dorothy. New Yorker. c. 25 July 1931.
De Saint-Exupery, Antoine. Vol de Nuit [Night Flight]. Éditions Gallimard, 1931, ch. 14.
Kafka, Franz. Betrachtungen über Sünde, Leid, Hoffnung und den wahren Weg [Reflections on Sin, Pain, Hope and the True Way]. Gustav Kiepenheuer Verlag, 1931, no. 109.
Nathan, George Jean. Testament of a Critic. A. A. Knopf, 1931, bk. 1.
Brecht, Bertolt. Die Mutter. Leben der Revolutionärin Pelagea Wlassowa aus Twer [The mother. Life of the Revolutionary Pelagea Vlassova from Tver]. 17 Jan. 1932, Komödienhaus am Schiffbauerdamm, Berlin, Germany.
Brecht, Bertolt. The Mother. Grove Press, 1994.
Jung, Carl. "Die Lebenswende." Seelenprobleme der Gegenwart. Rascher, 1931.
Santayana, George. The Genteel Tradition at Bay. Charles Scribner's Sons, 1931, ch. 2.
Aldington, Richard. The Colonel's Daughter. Chatto and Windus, 1931.
Cather, Willa. Shadows on the Rock. Alfred A. Knopf, 1931, bk. 3, ch. 5.
Hand, Learned. Speech to the Yale Law graduates. Graduation cermony. 17 June 1931, Yale Law School, New Haven, CT, USA.
Smith, Logan Pearsall. "Life and Human Nature." Afterthoughts. Constable & Company, 1931.
Wrigley, William Jr. "Spunk Never Cost Man a Job Worth Having." Interviewed by Neil M. Clark. The American Magazine, Mar. 1931.
Einstein, Albert. "Albert Einstein." Living Philosophies. Simon & Schuster, 1931, ch. 1.
Einstein, Albert. Speech at the California Institute of Technology. 16 Feb. 1931, California Institute of Technology, Pasadena, CA, USA.