TY  - BOOK
AU  - N/A
TI  - Science: Lever, Wheel, Axle, and Pulley
AV  - 621.8/ L658 
U1  - 621.8/ L658 
PY  - 2011///
CY  - Quezon City
PB  - Felta-Multi Media Cemter
N1  - GS; Science
ER  -