1. Tests of significance in factor analysis;Bartlett;Brit. J. Statist. Psychol.,1950
2. Research designs in psychological genetics with special reference to the multiple variance method;Cattell;Amer. J. Human Genet.,1953
3. A follow-up study of 128 closed head injuries in twins using co-twins as controls;Dencker;Acta Psych. Neurol. Scand.,1958
4. Metodiken vid den forsta lasundervisningen; en oversikt och experimentella bidrag;Naeslund,1956
5. Individual differences in colour vision;Pickford,1951