Primary sources that have been edited, reprinted in facsimiles, or transferred to microfilm can be borrowed through E-ZBorrow or Interlibrary Loan if they are not in Tripod. Many of them will be listed in Tripod or WorldCat under subject terms and the word "sources." For example, the search latin america* history sources produces books including:
Books printed in earlier time periods are kept in libraries' rare book collections. You can use Haverford's Special Collections and Bryn Mawr's websites to look for relevant books including: