On 8 December 2010 11:46, Amir E. Aharoni amir.aharoni@mail.huji.ac.il wrote:
For some time i used to fight this problem by adding "-site:wikipedia.org-site: wapedia.mobi -site:miniwiki.org" etc. to my search queries, but i hit a wall: Google limits the search string to 32 words, and today there are many more than 32 sites that clone Wikipedia, so this trick is also becoming useless.
As noted above you can use -wikipedia; alternately, keywords common on mirrors, such as -mediawiki, -gfdl could be worth trying.