This set of links are resources associated with contemporary history of the Caribbean. The left hand column has resources by type and the right hand column has resources organized by state.
United States Central Intelligence Agency. Central America and the Caribbean. Map. Washington, D.C.: Central Intelligence Agency, 2002. Library of Congress. https://www.loc.gov/item/2008621835/.
Puerto Rico is part of the U.S. Look at the 19th Century or Contemporary primary source guides for more collections that include Puerto Rico.
In our very own special collections library (Burns), you'll find a selection of material on your topic. Consider visiting the library and seeing history in your hands. To do so, you should start by searching for material through BC Libraries' catalog and then ordering it (if you haven't registered, you'll be prompted). For a guide on the process, check out the "Finding Burns Material" page. You might also check out the following recommendations: