TY  - BOOK
AU  - Osherson, Daniel N. 
TI  - Logical abilities in children
T2  - Child psychology
SN  - 0470657243
U1  - 155.413 
PY  - 1974///
CY  - Potomac
PB  - Lawrence Erlbaum Associates
N1  - Includes index; Contents:v.2. Logical inference: underlying operations
ER  -