The validation of test items 
By: by John A. Long, Peter Sandiford and others.
Contributors: Sandiford, Peter, 1882-1941, joint author.
Series: Toronto. University. Bulletin no. 3 of the Department of educational research
Publisher: The Dept. of educational research, University of Toronto
Published: 1935
Place of publication: Toronto
Language: eng
Number of pages: 126
Subjects: Mental tests; Education -- Statistics
Genres: Statistics.
Notes: Bibliography: p. 125-126.