Bernreuter, Robert G., "Differential Prediction of Scholastic Success." Paper read before APA meeting, Detroit, I947.
2.
Coblentz, Irving, Prognosis of Freshman Academic Achievement at the Pennsylvania State College. Unpublished Doctoral Dissertation, Pennsylvania State College, 1942 .
3.
Reppert, Harold C.A Hollerith Technique for Assigning Letter Grades and Standard Scores, Applied to the Psycho-Educational Clinic Guidance Program. Unpublished Master's Thesis, Pennsylvania State College, 1942.
4.
Phillips, C.Lee, Borow, Henry, et al. Unpublished studies, Pennsylvania State College.
5.
Moore, B. V. and Nell, R. B.The Pennsylvania State College Academic Aptitude Examination . Pennsylvania State College, 1939 .
6.
Segal, David. "The Automatic Prediction of Scholastic Success by Using the Multiple Regression Technique with Electrical Tabulating and Accounting Machines." Journal of Educational Psychology, XXII ( 1931), 139-144.