SuperSearch can be a great place to start to find out what's out there on your topic. SuperSearch will find books, journal articles, films, news, and almost everything else the library has — from popular to scholarly sources. You can use the filters on the results screen to improve your results.
For searching with more focus and precision, try one of the databases recommended on this guide.
Historical Dictionary of Spain
Historical Dictionary of the Spanish Civil War by 
Historical Dictionary of the Catalans by 
Historical Dictionary of Spanish Cinema by 
Encyclopedia of Contemporary Spanish CultureAnnotated bibliographies for a variety of subject areas.
If you need help on how to write in Spanish using your computer, please check out the guide, Writing in a Foreign Language.