The following are references to some archival information systems of national and international archival significance. For some specific state archival institutions, the references are to specific information systems, bearing in mind that the remaining State Archives are related to the national archival system SIAS.
Bibliographical Information
When one embarks on historical research it is essential to acquire adequate bibliographical information, and sometimes it is very useful to do a focused search on specialized journal and on their indices, which are also found on-line.