Ellis Library does not have Spanish newspapers for the 20th century, but we do have a membership in the Center for Research Libraries, which holds many years of Spanish newspapers.
You may borrow newspapers, which may be in print or on microfilm, using Interlibrary Loan (ILL@MU)
This is by no means all there is in Special Collections, but these two resources relate to remembrance of the Spanish Civil War.
For primary sources from this period, go to the Books tab on the library home page and include SU:sources in your search.
Example: SU:Spain and ("20th century" OR "civil war") and SU:sources
Note: using SU: forces the search to look at books that have the word after the colon in the subject heading.
