A Procedure for Transforming Scores Unique to Part of a Student Population to the Scale of a Common Examination Taken By the Entire Student Population

Flanagan, J. C. A Bulletin Reporting the Basic Principles and Procedures Used in the Development of Their System of Scaled Scores. New York: Cooperative Test Service, American Council on Education, 1939. 41 p.

Gulliksen, Harold. Theory of Mental Tests . New York: John Wiley and Sons , 1950.