TY  - BOOK
AU  - Murphy,Stuart J.
AU  - Karas,G.Brian
TI  - Elevator magic
SN  - 0060267747
AV  - QA115 .M868 1997
U1  - 513.2/12 20
PY  - 1997///
CY  - New York, NY
PB  - HarperCollins
KW  - Subtraction
KW  - Juvenile literature
N1  - "Level 2, subtracting."; Includes bibliographical references (p. [33])
N2  - Explains the concept of subtraction through a rhyming text about a descending elevator
ER  -