TY  - BOOK
AU  - CLARIDGE, Gordon, CANTER, Sandra and HUME W.I.
TI  - Personality Differences & Biological Variations: A Study of Twins 
SN  - 0080171249
AV  - BF723.T9.C53 
PY  - 1973///
CY  - Oxford
PB  - Pergamon Press
KW  - Psychology
ER  -