An online-search is possible in three categories. in catalogues, in databases and in internet search services.
Search for the titles of journals:
Elektronische Zeitschriftenbibliothek = electronic journal-library EZB
Zeitschriftendatenbank ZDB: world's largest database of titles of journals
How to get literature, that is not available in Tuebingen?
licensed databases (available only in the network of the university):
database information system - an index of databases everywhere
jstor database of journal articles (also try the tool JSTOR text analyzer)
Menalib - virtual library of the middle east
Facts and documents:
Statistics of the EU: EuroStat
Please use the "advanced search" option of search engines, often displayed after searching. The search operatos are really helpful. The special service 2lingual Search gives the opportunity to initiate a translated search via Google.
Meta search engine: etools.ch
Special search engines:
scientific search engine: Google Scholar
search for news: GoogleNews
full text search (repositories)
The "SozialwissenschaftenFAQ" is a guide (German/English) in very limited space, which after an introduction to scientific research is limited to the most important web addresses for social science research.