A Portable Phonographic Apparatus for Giving Objectively Uniform Suggestions
Clark Leonard Hull, Robert G. Krueger, Griffith Wynne Williams · The American Journal of Psychology · 1930
Clark L. Hull, Robert G. Krueger, Griffith W. Williams, A Portable Phonographic Apparatus for Giving Objectively Uniform Suggestions, The American Journal of Psychology, Vol. 42, No. 3 (Jul., 1930), pp. 442-444