TY  - BOOK
AU  - Richards,Jon
TI  - Forces & simple machines
T2  - Science factory
SN  - 8121933277
U1  - 621.8078 22
PY  - 2010///
CY  - Rudrapur
PB  - Nirja Publisher & Distributors
KW  - Simple machines
KW  - Juvenile literature
N1  - Includes index
ER  -