TY  - BOOK
AU  - Packard Rosa Covington
TI  - The Hidden Hinge
SN  - 0819000744
AV  - LB1140.2 .P28
U1  - 372.1/3 
PY  - 1972///
CY  - N.Y., Notre Dame, Ind.
PB  - Ballantine Books, Fides Publishers
KW  - Montessori Maria
KW  - Education, Preschool
KW  - Self-development
KW  - 教育
N1  - Bibliography: p. 206-214
ER  -