TY  - BOOK
AU  - Halford,Graeme S.
TI  - The development of thought
T2  - Child psychology (Lawrence Erlbaum, Hillsdale)
SN  - 0-85859-177-5
U1  - 155.413 21E
PY  - 1982///
CY  - Hillsdale
PB  - Lawrence Erlbaum
N1  - Bibliogr. p. 403-430
ER  -