TY  - BOOK
AU  - Ashlock, Robert B.
TI  - Error patterns in computation: : using error patterns to improve instruction
SN  - 0130270938
U1  - 370.51 
PY  - 2002///
CY  - New Jersy
PB  - Merrill PH
KW  - Education
KW  - Special Education
KW  - Mathematics - Educational Aspects
ER  -