http://www.loc.gov/rr/hispanic/1898/treaty.html
http://www.history.com/topics/spanish-american-war
http://www.u-s-history.com/pages/h3617.html
http://www.biography.com/people/jos%C3%A9-mart%C3%AD-20703847
http://loc.gov/rr/hispanic/1898/mckinley.html