Reference books are usually encyclopedias, dictionaries, handbooks, atlases, etc. They are intended to provide quick, reliable information, summaries of complex matters, and, very importantly, bibliographies--suggestions for futher reading.
These reference materials are invariably written by experts in their fields, so they are more trustworthy than Wikipedia--all have gone through a process of editorial review. For an illustrated explanation, see the home page presentation, "What is a referred or scholarly article?"
All printed reference sources are located on the Main level, Du Bois Library.
DP12.S59 1996 Historical Dictionary of Spain.
DP17.S67 1990 Spain, a Country Study.
DP17.V56 1994 Cultural Atlas of Spain & Portugal
DP192.H57 1996 Historical Dictionary of Modern Spain, 1700-1988.
DP233.5.E63 1999 Encyclopedia of Contemporary Spanish Culture
DP269.H54 Historical Dictionary of the Spanish Civil War