Undated (stamped January 24,
1966 on cover)


July 15, 1949

1982
(From the collection of Hans Peter von Knorring)

Undated (1953 or 1954?)
(c. July) 1960

January 1, 1970

October 1974
December 15, 1977
US edition (System?)
April 26, 1981
US edition