Seesaws, nutcrackers, brooms
Subtitle: simple machines that are really levers
By: Christopher Lampton ; ill. by Carol Nicklaus.
Publisher: Millbrook Press
Published: 1991
Place of publication: Brookfield, CT
Language: eng
Number of pages: 32
Subjects: Simple machines; Levers; Science -- Experiments; Physics -- Experiments
Notes: j-133,243