What is a pulley? /

Douglas, Lloyd G.

What is a pulley? / Lloyd G. Douglas. - New York : Children`s Press, 2002. - 24 p. : col. ill.: 15 cm. - Simple machines .

Lex: BR


English

0-516-34024-2


Pulleys--Juvenile literature
Pulleys

621.811 D74w c2002