W. Kohlhammer GmbH , also known as Kohlhammer Verlag , is a German scientific publishing company based in Stuttgart . It is not a specialized publishing house , but a publisher specializing in specialist publications . W. Kohlhammer GmbH has also developed into a network of trade, production and service companies and is active in the areas of communication, electronic media, data storage and printing.
https://de.wikipedia.org/wiki/Kohlhammer_Verlag
https://www.kohlhammer.de/wms/instances/kohportal/appDE/nav_home.php
