Blum, Walter J. and Kalven, Harry Jr.
"The Art of Opinion Research: A Lawyer's Appraisal of an Emerging Science: Observations on "Communism, Conformity, and Civil Liberties","
University of Chicago Law Review: Vol. 24
, Article 2.
Available at: https://chicagounbound.uchicago.edu/uclrev/vol24/iss1/2