Handout 5
http://news.google.de/
http://images.google.de/
http://books.google.de/
http://www.archive.org
http://www.ddb.de
http://www.wolframalpha.com
http://dbis.uni-regensburg.de
http://scholar.google.de
http://search.creativecommons.org/
http://www.findsounds.com/
http://www.base-search.net
http://www.jstor.org