http://history.state.gov/milestones/1899-1913/roosevelt-and-monroe-doctrine
http://www.ushistory.org/us/44e.asp
http://www.ourdocuments.gov/doc.php?flash=true&doc=56
http://historyengine.richmond.edu/episodes/view/5487
http://www.u-s-history.com/pages/h1449.html