TY - BOOK AU - Douglas, Llyod G. TI - What is a Wheel and a Axle SN - 9780516240275 AV - 621.811 D74w c2002 PY - 2002/// CY - New York PB - Scholastic KW - Wheels KW - Juvenile literature KW - Axles N1 - Lex: 290 N2 - Introduces the wheel and axle as a simple machine that can make it easier to move heavy objects, as well as to flatten dough ER -