UdG users
1956-04-24 Letter
1956-06-11 Letter
1956-08-05 Letter
1956-08-24 Letter
1956-10-26 Letter
1957-01-17 Letter
1957-02-23 Letter
1957-03-27 Letter
1957-04-23 Letter
1957-07-14 Letter
1957-08-11 Letter
1957-08-29 Letter
1957-09-03 Letter
1957-09-23 Letter
1957-10-12 Letter
1957-10-24 Letter
1957-11-13 Letter
1957-11-19 Letter
1957-12-25 Letter
1957-12-29 Letter