books.google.com.au - The bicycle is almost unique among human-powered machines in that it uses human muscles in a near-optimum way. This new edition of the bible of bicycle builders and bicyclists provides just about everything you could want to know about the history of bicycles, how human beings propel them, what makes...http://books.google.com.au/books/about/Bicycling_Science.html?id=0JJo6DlF9iMC&utm_source=gb-gplus-shareBicycling Science
