A correlational analysis of proficiency in typing
By: by Luton Ackerson.  With a contribution on The correlation between speed and accuracy, by Truman L. Kelley.
Contributors: Kelley, Truman Lee, 1884-1961.
Series: Archives of psychology -- no. 82.
Publisher: [s.n.]
Published: 1926
Place of publication: New York
Language: eng
Number of pages: 73
Subjects: Typewriting
Other titles: The correlation between speed and accuracy.
Notes: Issued also as thesis (PH. D.) Columbia University.

Bibliography: p. 71-73.