The previous page is sending you to http://webcache.googleusercontent.com/search?q=cache:xUZI5Cx-fr8J:http://www.investopedia.com/articles/07/roots_of_money.asp%2BThe+History+Of+Money+From+Barter+To+Banknotes++trabajo&hl=de&ct=clnk.

 If you do not want to visit that page, you can return to the previous page.