TY  - BOOK
AU  - Brueckner,Leo J., Grossnicke, Foster E.
AU  - x
TI  - developing mathematical understandings the upper grades: x
SN  - x
U1  - 510.7/BRD 
PY  - 1961///
CY  - N.Y.
PB  - Holt
KW  - Mathematics - Study and Teacheing
N1  - x
ER  -