50105.1

Circular Letters No.1-72.
Editor : No.1-9 Willy Begert No. 11-71 Hanspeter Müller
No.10 Maurice Tadier No. 72 Nicholas Paster

(1951 - 1959)

  50105.2

Workcamps across the World, Bulletins Vol.I-VII.

(1961 - 1967)

  50105.3a

Newsletters No.1-3.

(1964 - 1965)

  50105.3b

COCO News No.1-21.

(1966 - 1971)

  50105.3c

Clearing House News.

(1960 - 1971)