Tolong jelaskan mengenai Haldeman-Julius.org, Haldeman-Julius Family Tree. dari E. Haldeman-Julius

Herder, Dale M. "Haldeman-Julius, The Little Blue Books, and the Theory of Popular Culture." Journal of Popular Culture, vol. 4.4 (Spring 1971), pp. 881–891.

Herrada, Julie. "Emanuel Haldeman-Julius" in The New Encyclopedia of Unbelief (ed. Tom Flynn), pp. 374–376.

Jacoby, Susan. Freethinkers: A History of American Secularism. New York: Henry Holt, 2004.

Lee, R. Alton. Publisher for the Masses: Emanuel Haldeman-Julius. Lincoln, NE: University of Nebraska Press, 2017.

Leinwand, Gerald. 1927: High Tide of the Twenties. NYC: Four Walls Eight Windows, 2001. pp. 293–297 (excerpts).

Mordell, Albert. Trailing E. Haldeman-Julius in Philadelphia and Other Places (ed. E. Haldeman-Julius). Girard: Haldeman-Julius, 1949.

Mordell, Albert. "Culture Salesman from Girard." The Brooklyn Jewish Center Review, vol. 33.12 (Nov. 1951), pp. 5–10.

Potts, Rolf. "The Henry Ford of Literature." The Believer, vol. 6.7 (Sept. 2008).

Ryan, William F. "Bertrand Russell and Haldeman-Julius: making readers rational." Russell, nos. 29-32 (1978), pp. 53–64.

Scott, Mark. "The Little Blue Books in the War on Bigotry and Bunk." Kansas History, vol. 1.3 (Fall 1978), pp. 155–176.

Victor, Jane. "Emanuel Haldeman-Julius: The Paper Giant" (Pittsburg State Axe Library).

Wagner, Rob Leicester. "Hollywood Bohemia: The Roots of Progressive Politics in Rob Wagner's Script." Santa Maria, CA: Janaway Publishing, 2016 ()

White, Kevin. The First Sexual Revolution: The Emergence of Male Heterosexuality in Modern America. NYC: New York Univ. Press, 1993.

Whitehead, Fred and Verle Muhrer (edd.). Freethought on the American Frontier. Amherst, NY: Prometheus, 1992.