UdG users
1936-07-09 Letter
1936-07-15 Letter
1936-09-16 Letter
1936-11-17 Letter
1937-01-30 Letter
1937-04-20 Letter
1937-04-22 Letter
1937-08-16 Letter
1937-12-17 Letter
1939-07-21 Letter
1940-01-18 Letter
1940-01-19 Letter
1940-01-30 Letter
1940-02-19 Letter
1940-02-27 Letter
1940-03-18 Letter
1940-04-04 Letter
1940-04-07 Letter
1940-07-14 Letter
1940-07-25 Letter
1940-10-14 Letter
1940-11-10 Letter
1940-11-14 Letter