TY  - BOOK
AU  - Murphy,Stuart J.
AU  - Karas,G.Brian
TI  - Elevator magic
SN  - 0064467090
AV  - QA115 .M868 1997
U1  - 513.2/12 
PY  - 1997///
CY  - New York
PB  - HarperCollins
KW  - Subtraction
KW  - Juvenile literature
KW  - sears
N1  - ALA Booklist; Horn Book; Science Books and Films; School Library Journal; 2; 1-4
N2  - Explains the concept of subtraction through a rhyming text about a descending elevator
ER  -