TY  - BOOK
AU  - Ashlock, Robert B.
TI  - Error Patterns in Computation: Using Error Patterns to Help Each Student Learn
SN  - 9780135009109
AV  - QA 135.5  .A8 2010
PY  - 2010///
CY  - Botson
PB  - Allyn & Bacon
KW  - Arithmetic--Study and teaching [Elementary]
ER  -