6
by Berg, W.B
Frankfurt am Main : Vervuert Verlagsgesellschaft, [2004]
eBook
7
by Berg, W.
[3rd European colloquium at Zürich, August 1971]. Reprint 2018 - Berlin : De Gruyter, 2018
eBook
8
by Opitz, Hans
Berlin [u.a.] : Springer, 1965
Book