1. Adler, M. J. How to read a book. New York: Simon & Schuster, 1940.
2. Alderman, G. H. Improving comprehension in reading.J. educ. Res., 1926,13, 11–21.
3. Berry, B. T. Improving freshman reading habits.Engl. J., College Edition, 1931,20, 824–828.
4. Carroll, R. P. An experimental study of comprehension in reading. New York: Teachers College, Columbia University, 1927.
5. The Cooperative General Achievement Tests (Revised Series): Information concerning their construction, interpretation, and use. New York: Cooperative Test Service, 1940.