1. Beebe Center, J. G., The Psychology of Pleasantness and Unpleasantness (New York: Van Nostrand Co., Inc., 1932).
2. Hall, I. S., and Hall, C. S., J. Amer. Dietetic Assoc., 15, 540 (1939).
3. Clark, F. E. Le G., The School Child's Taste for Vegetables (Hertford: Stephen Austin and Sons, 1943).
4. Dove, W. F., Human Biol., 15, 199 (1943).
5. Dove, W. F., Food Technol., 1, 39 (1947).