TY - BOOK AU - Andrew, Dunn. TI - Lifting by levers: how things work SN - 9780750202183 U1 - 621.811 DUN PY - 1991/// CY - England PB - Wayland, KW - Levers KW - Juvenile literature. KW - Lifting and carrying KW - Juvenile literature N1 - Includes index N2 - Describes simples machines which utilize the principle of levers to move heavy objects, cut material, and make music ER -