The system will bring you a page containing a list of the documents found in the database tha match your search criteria. The order you type the words in does not affect the retrieval. The case of the letters you type does not affect the result. Do not enter punctuation like commas, semicolons, and so on. Do not use diacritics either.
Some words have a special meaning for the retrieval system.
If you need to use them in your search, type then in quotes. The incunabula only have a shortened description referring to the great indexes where they are widely described. So the system understands that every typed word must appear in a register to be retrieved. Is the spanish form for the boolean operator or . If used, the system will retrieve any record where some of the typed words appears.