TY  - BOOK
T1  - Problem solving with number patterns /
DA  - c1987.
CY  - Bowling Green, Ohio :
AU  - Duncan, David R.
AU  - Litwiller, Bonnie H.
CN  - QA139
CN  - QA139
PB  - School Science and Mathematics Association,
PP  - Bowling Green, Ohio :
PY  - c1987.
N1  - "Spring, 1987."
ID  - 123522
KW  - Arithmetic
KW  - Mathematics
SN  - 0912047062
TI  - Problem solving with number patterns /
ER  -