00619cam a2200205 4500 112890140 TxAuBib 20120831120000.0 030811s2005||||||||||||||||||||||||und|u 9781595151254 1595151257 TxAuBib Freeman, Marcia S. The Work Book : a book about forces/ motion/ energy. Vero Beach, FLA : Rourke Publishing, 2005. 24 p. 20120111. Work (Mechanics)--Juvenile literature. Simple machines.