Running Through the Ages - Edward S. Sears - Google Books

http://books.google.de/books?id=vxxOw3FvOgwC&pg=PA115&dq=%22Walter+G.+George&hl=de&ei=544PTqe7IoWAOvfc5bkL&sa=X&oi=book_result&c

   Throughout most of human history, running was necessary for survival. In present times, it has become an ever-popular way to promote physical fitness. This work takes a close look at the history of running from the era when running was a survival skill…