TY  - BOOK
AU  - Immerzeel,George
AU  - Wills,Bob
TI  - IDEAS from the Arithmetic teacher: grades 4-6, intermediate school 
AV  - QA139 .I343 1979
PY  - 1979///
CY  - Reston, Virginia
PB  - National Council of Teachers of Mathematics
KW  - Mathematics
KW  - Study and teaching (Elementary)
KW  - Arithmetic
KW  - Problems, exercises, etc
N1  - 2
ER  -