Zechariah Chafee (1920). Free Speech. New York: Harcourt, Brace and Howe.
Chafee, Zechariah (June 1919). "Freedom of Speech in War Times". Harvard Law Review. 32 (8): 932–973. doi:10.2307/1327107. JSTOR1327107. Chafee, Zechariah (November 16, 1918). "Freedom of Speech". The New Republic. No. 17. p. 66. Henry R. Linville, John L. Tildsley, and Z. Chafee Jr., " The Schools and the Issue of Freedom," in leaflets, "The Public and the Schools," published by Public School Education Assn., N. Y., May 3, 17, 24, 1919.
Chafee, Zechariah (June 1919). "Freedom of Speech in War Times". Harvard Law Review. 32 (8): 932–973. doi:10.2307/1327107. JSTOR1327107. Chafee, Zechariah (November 16, 1918). "Freedom of Speech". The New Republic. No. 17. p. 66. Henry R. Linville, John L. Tildsley, and Z. Chafee Jr., " The Schools and the Issue of Freedom," in leaflets, "The Public and the Schools," published by Public School Education Assn., N. Y., May 3, 17, 24, 1919.
Chafee, Zechariah (June 1919). "Freedom of Speech in War Times". Harvard Law Review. 32 (8): 932–973. doi:10.2307/1327107. JSTOR1327107. Chafee, Zechariah (November 16, 1918). "Freedom of Speech". The New Republic. No. 17. p. 66. Henry R. Linville, John L. Tildsley, and Z. Chafee Jr., " The Schools and the Issue of Freedom," in leaflets, "The Public and the Schools," published by Public School Education Assn., N. Y., May 3, 17, 24, 1919.