lccn 68-25655
isbn 07-034780-8 (sic, per tp verso)
Categories:
["Science""Life sciences""Earth sciences""Study and teaching (Middle school)""Physical sciences""Study and teaching (Secondary)""Chemistry""Sciencejuvenile literature""Mechanics""Physics""Force and energy""Force and energyjuvenile literature""Motion""Motionjuvenile literature""Physicsjuvenile literature""Long Now Manual for Civilization"]