1930
Einstein, Albert. "Letter to his son Eduard." Quoted in Einstein: His Life and Universe, by Walter Isaacson. Simon & Schuster, 2007. Originally from Letter to his Son Eduard, 5 Feb. 1930.
Civilization and Its Discontents
Freud, Sigmund. Das Unbehagen in der Kultur [The Discomfort in Culture]. Internationaler Psychoanalytischer Verlag Wien, 1930, pt. 8.
Freud, Sigmund. Civilization and Its Discontents, translated by James Strachey. W. W. Norton & Company, 2021, pt. 8.
Einstein, Albert. "What I Believe. Living Philosophies 13." Forum and Century, Oct. 1930, vol. 84, issue 4, pp. 193-194.
Einstein, Albert. Quoted in "Clearfield Progress, Would Take Three Days to Make Simple Explanation of Theories, Says Einstein," by David P. Sentner, I. N. S. (International News Service) Correspondent. Quote Page 1, Column 1, Clearfield, Pennsylvania. 12 Dec. 1930.
Hammett, Dashiell. "The Maltese Falcon." Black Mask, Sept. 1929 - Jan. 1930.
Hammett, Dashiell. "The Maltese Falcon." The Maltese Falcon, The Thin Man, Red Harvest. Everyman's Library, 2000, ch. 12.
Ortega y Gasset, Jose. La Rebelion de las Masas [The Revolt of the Masses.] El Sol, 1929, serial.
Ortega y Gasset, Jose. The Revolt of the Masses. W. W. Norton & Company, 1994, ch. 10.
Hammett, Dashiell. "The Maltese Falcon." Black Mask, Sept. 1929 - Jan. 1930. Serial.
Hammett, Dashiell. "The Maltese Falcon." The Maltese Falcon, The Thin Man, Red Harvest. Everyman's Library, 2000, ch. 7.
Ortega y Gasset, Jose. La Rebelion de las Masas [The Revolt of the Masses.] El Sol, 1929, serial.
Ortega y Gasset, Jose. The Revolt of the Masses. W. W. Norton & Company, 1994, ch. 8.
Russell, Bertrand. The Conquest of Happiness. Liveright, 1930, ch. 12.
Kunitz, Stanley. "Route Six." New England Review, c. 1993.
Hamilton, Edith. The Greek Way. W. W. Norton & Company, 1930, ch. 2.
Jeans, James. The Mysterious Universe. Cambridge University Press/Macmillan, 1930, ch. 5.
Briffault, Robert. The Making of Humanity. London: G. Allen & Unwin Limited.
Briffault, Robert. Rational Evolution (The Making of Humanity). Routledge, 2019, ch. 15.
Lawrence, D.H. "The Ship of Death." Last Poems, edited by Richard Aldington and Giuseppe Orioli. The Viking Press, 1932, stanza 1.
Einstein, Albert. "What I Believe. Living Philosophies 13." Forum and Century, Oct. 1930, vol. 84, issue 4, pp. 193-194.
Hammett, Dashiell. "The Maltese Falcon." Black Mask, Sept. 1929 - Jan. 1930. Serial.
Hammett, Dashiell. "The Maltese Falcon." The Maltese Falcon, The Thin Man, Red Harvest. Everyman's Library, 2000, ch. 7.
Trotsky, Leon. Моя Жизнь [My Life]. Charles Scribner's Sons/Thornton Butterworth, 1930, ch. 40.
Keynes, John Maynard. "Economic Possibilities for Our Grandchildren." The Nation and Athenaeum, 11 and 18 Oct. 1930.
Keynes, John Maynard. "Economic Possibilities for Our Grandchildren (1930)." The Essential Keynes. Penguin, edited by Robert Skidelsky, 2016.