TY  - BOOK
AU  - Claridge, Gordon.
AU  - Canter, Sandra
AU  - Hume, W.I.
TI  - Personality differences and biological variations: A study of twins
T2  - International series of Monographs in Experimental Psychology
SN  - 0080171249
U1  - 155.22 
PY  - 1973///
CY  - Oxford
PB  - Pergamon Press
ER  -