For information on Spanish legal materials, see the Guide to Legal Research in Spain by Olga Cabrero. See also the Guide to Law Online: Spain and the other sources discussed in the "Foreign Laws" entry of this Guide.
Information on Spanish companies is available from the subscription-based Skyminder. Matthew Bender publishes a guide to Doing Business in Spain that is available on Lexis (MATBEN;DBSPAI). See also the sources discussed in the entries for "Company Information" and "Doing Business in Foreign Countries."