TY  - BOOK
AU  - Gattegno,C.
TI  - Arithmetic with numbers in colour: book 1
U1  - 372.72 
PY  - 1957///
CY  - Reading CA: 
PB  - Educational Explorers
KW  - Arithmetic - Study and teaching (Primary)
KW  - Number concepts
KW  - Cuisenaire rods
ER  -