http://www.ourdocuments.gov/doc_large_image.php?flash=true&doc=23
https://history.state.gov/milestones/1899-1913/roosevelt-and-monroe-doctrine
http://www.jstor.org/discover/10.2307/27552743?sid=21106181676893&uid=2&uid=3739792&uid=3739256&uid=4
http://www.ourdocuments.gov/doc.php?flash=true&doc=56