Some Trends in the Development of Psychology as a Profession in the United States of America

American Psychological Association , 1955 Directory . Washington, D.C.: The American Psychological Association, 1955, p. xxvii.

The American Psychologist, 1953, 8, 216.

Heyns, Roger W. : "How many psychologists will be affected by legislation?" The American Psychologist, 1953, 8, 571.

Malzberg, Benjamin : Social and Biological Aspects of Mental Disease. Utica, N.Y.: State Hospitals Press, 1940 , pp. 50-1.

Wolfle, Dall: "Comparisons between psychologists and other professional groups." "It is estimated that, as of 1953 ... 22,000 persons [were] working as psychologists in the United States.... About 12 per cent [of all college graduates majoring in psychology] have become professional psychologists, [accounting for] half of all the people ... working as 'psychologists'." The American Psychologist, 1955 , 10, 236.

Woytinsky, W.S. , and Woytinsky, E.S. : World Population and Production. New York: The Twentieth Century Fund, 1953, p. 225.

ibid., p. 355.

ibid., p. 356.

ibid., p. 359.

Young, Marguerite L. , and Wilson, John T. : "Government support of psychological research." The American Psychologist, 1953 , 8, 489-93.

ibid., p. 492.