books.google.se - PRINCIPLES OF ECONOMICS continues to be the most popular and widely used text in economics classrooms today. The fifth edition features a strong revision of content in all 36 chapters while maintaining the clear, accessible writing style and precise presentation that are the hallmark of this highly respected...http://books.google.se/books/about/Principles_of_economics.html?hl=sv&id=oRgQ2goeFzwC&q=exports&utm_source=gb-gplus-sharePrinciples of economics