TY  - BOOK
AU  - Rosskopf,Myron F.
TI  - Children's mathematical concepts : six Piagetian studies in mathematics education
SN  - 0807724467
U1  - 372.7019 ROS 
PY  - 1975///.
CY  - New York : 
PB  - Teachers College Press, 
KW  - Elementary education-children's mathematical concepts
KW  - Elementary education-mathematics
KW  - Mathematics -- Study and teaching (Elementary)
ER  -