TY  - BOOK
AU  - Muller,Philippe
TI  - The tasks of childhood
T2  - World university library
AV  - BF721 .M7913
U1  - 155.4 
PY  - 1969///]
CY  - New York
PB  - McGraw-Hill
KW  - Child development
KW  - Local
N1  - Bibliography: p. 243-251
ER  -