REFERENCES
- Business Man's Dictionary. Garden City, New York, Doubleday, Doran & Co., 1930.
- Feigl, H.: In Feigl, H. and Brodbeck, M. (ED.): Readings in the Philosophy of Science. New York, Appleton-Century-Croits, Inc., 1953.
- Hilton, O.: Scientific Examination of Questioned Documents. Chicago, Callaghan & Co., 1956.
- Ames, D. T.: Ames on Forgery. New York, Ames-Rollinson Co., 1900.
- Osborn, A. S.: Questioned Documents. Eds. 1 and 2. Albany, Boyd Printing Co., 1910, 1929.
- Bruner, J. S., Goodnow, J. J. and Austin, G. A.: A Study of Thinking. New York, John Wiley & Sons, 1957.