Beltz Quadriga Verlag

Publishing label within the Verlagsgruppe Beltz from 1984 until 1999, when it was sold to Ullstein Buchverlage. It was established by implementing "Quadriga Verlag J. Severin", which was bought before. "Quadriga Verlag" itself was founded 1983 and arose from the publisher "Verlag Severin & Siedler".