1. Numbers in brackets indicate chapters in which references are cited.
2. Adamson, R. E. Functional fixedness as related to problem solving. Journal of Experimental Psychology, 44, 288–291.
3. An analysis of quality in the associated public school systems through a study of the patterns of diffusion of selected educational practices;Adler,1955
4. The effect of a synthetic marihuana-like compound on musical talent as measured by the Seashore Test;Aldrich;Public Health Reports,1944
5. Morphological creativity;Allen,1962