Further Research guides, bibliographies For the most thorough research, click on and explore all categories. It covers a wide variety of subjects focusing on economic and political topics. Includes biographies, bibliographies, numerous contemporary and historical illustrations and photographs. Lengthy illustrated articles.
Bibliographies emphasize Spanish-language materials.
Published in 1971. A large, classic Spanish-language encyclopedia in 70 volumes. Lengthy illustrated articles on general topics. Published 1907 - 1930. Updated with supplements.