References
- Cumbee , Frances Z. 1954 . A factorial analysis of motor co-ordination . Research Quarterly , 25 Dec. : 412 – 428 .
- Harris , C. W. and Schmid , John Jr. 1950 . Further applications of the principles of direct rotation in factor anaylsis . Journal of Experimental Education , 18 March : 175 – 193 .
- Rimoldi , Horacio J. A. 1951 . Personal tempo . Journal of Abnormal and Social Psychology , 46 July : 283 – 303 .