TY  - BOOK
AU  - Murphy, Stuart
TI  - Elevator magic
SN  - 0-04-446709-0
AV  - TR(GS 513.2'12 M95 1997
PY  - 1997///
CY  - New york
PB  - Harper collins
KW  - Subtaction
N2  - Explains the concept of subtraction through a rhyming text about a descending elevator
ER  -