WARNING THIS IS A PRIVATE COPY FOR EDUCATIONAL PURPOSES ONLY PROHIBITED: SALE, DISTRIBUTION AND MARKETING  The purpose of the library is to promote free education by lending books to people in the poorest sectors of society for economic, geographic location or physical disabilities have no possibility to access public, academic or government libraries. Consequently, once you read this book is considered past due loan thereof and shall be destroyed. Failure to do so, you may be liable for damages arising from such breach.  If you can finance the book, we recommend that you buy from any bookstore in your country.  The project does not obtain any financial gain, directly or indirectly.  If the laws of your country do not permit this type of loan, please do not use this virtual library. “He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me.” ― Thomas Jefferson, Selected Writings For other publications visit www.lecturasinegoismo.com Reference: 514