UdG users
[19??]-02-13 Letter
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[19??]-11-20 Letter
192?-08-03 Letter
1922-08-04 Letter
1923-07-07 Letter
1924-07-09 Letter
1924-07-13 Letter
1924-08-05 Letter
1924-09-18 Letter
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1924-12-19 Letter
1924-12-27 Letter
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1925-01-06 Letter
1925-04-04 Letter