TY  - BOOK
AU  - Ashlock,Robert B.
TI  - Error patterns in computation
SN  - 0135731976 
AV  - QA135.5 .A782 1998
U1  - 372.7/2044 21
PY  - 1998///
CY  - Upper Saddle River, N.J.
PB  - Merrill
KW  - Arithmetic
KW  - Study and teaching (Elementary)
N1  - Includes bibliographical references (p. 266-285)
ER  -