Verlag Dr. Köster is the publisher in Germany founded in 1993.
According to PR-model, verlag-koester.de is ranked 82,991st in multilingual Wikipedia, in particular this website is ranked 7,130th in German Wikipedia.
The website is placed before tulip-tv.co.jp and after city.nagato.yamaguchi.jp in the BestRef global ranking of the most important sources of Wikipedia.