TY  - BOOK
AU  - Retherford,Robert D.
AU  - Sewell,William H.
TI  - Birth order and intelligence: further tests of the confluence model 
PY  - 1991///
CY  - Honolulu
PB  - East-West Population Institute
KW  - Birth order
KW  - Children
KW  - Intelligence testing
ER  -