1-9 of 9 Books

Work
By Sally M. Walker,Roseann Feldmann,Andy King
Work, power and efficiency
Work, power and efficiency
By Alois Koller
Arbeit, Leistung, Wirkungsgrad
Arbeit, Leistung, Wirkungsgrad
By Alois Koller

16-19 mathematics
By School Mathematics Project.
Work, power, and machines
Work, power, and machines
By Steve Tomecek