Pedal power : in work, leisure and transportation /
Pedal power : in work, leisure and transportation /
edited by James C. McCullagh, with contributions from: David Gordon Wilson, [et al].
- Emmaus, Pa. : Rodale Press, c1977.
- x, 133 p. : ill.
0878571787
Pedal-powered mechanisms.
0878571787
Pedal-powered mechanisms.