TY  - BOOK
AU  - Shields, James
TI  - Monozygotic twins: brought up apart and brought up together : an investigation into genetic and enviromental causes of variation in personality 
AV  - BF 723.T9 S4
PY  - 1962///
CY  - London
PB  - Oxford University
KW  - Gemelos
KW  - Psicología genética
ER  -