31006.1

Bulletins No.33-35 (edited in Kassel & Düsseldorf) 1965.
Bulletins 1965-67, Info des IZD.

(1965 - 1967)

  31006.2

Bulletins.

(1968 - 1975)

  31006.3

Correspondence and Various documents (from Lutz Caspers)

(1967 - 1974)