1. Relationship between circadian rhythm of body temperature and introversion-extraversion;Blake;Nature,1967
2. Temperament and time of day;Blake,1971
3. Introversion-extraversion and circadian rhythms;Blake;Aspects of Human Efficiency,1972
4. The IPAT Culture Fair Intelligence Scales 1, 2 and 3;Cattell,1966
5. Temperament, inspection efficiency and time of day;Colquhoun;Ergonomics,1960