UdG users
1946-06-06 Letter
1946-07-02 Letter
1946-07-06 Letter
1946-08-18 Letter
1948-04-04 Letter
1948-07-21 Letter
1949-08-06 Letter
1949-08-29 Letter
1949-09-15 Letter
1949-10-03 Letter
1950-07-16 Letter