OneSearch (below) searches many of the library's database at the same time, as well as the library's print and ebook collections. This is the best place to start your research. After you search, look on the lefthand menu to filter by language and select "Spanish".
Find articles in library databases. Each database contains different articles so try more than one to find what you need.
Most library databases have the ability to filter results by language. Look for the filter "Language" and select "Spanish" to limit your results to Spanish-language books and articles only. Note: this filter may only be on the Advanced Search page.
In JSTOR Advanced Search
In OneSearch, look on the lefthand filters after searching: