Wfk is the nonprofit cleaning technology research institute in Krefeld, Germany.
According to PR-model, wfk.de is ranked 1,940,649th in multilingual Wikipedia, in particular this website is ranked 246,687th in German Wikipedia.
The website is placed before sprueche-suche.de and after wfk-iaf.de in the BestRef global ranking of the most important sources of Wikipedia.
