1. An introduction to motivation;Atkinson,1964
2. Anxiety and stress;Basowitz,1955
3. Social attitudes and other acquired behavioral dispositions;Campbell,1963
4. The children's form of the manifest anxiety scale;Castaneda;Child Develpm.,1956
5. The nature of anxiety: a review of thirteen multivariate analyses comprising 814 variables;Cattell;Psychol. Rep.,1958