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. 
<br/><br/><label>ISBN: </label>0878571787 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pedal-powered mechanisms.