Harold W. Mattke Diaries, M/A 0240. Hennepin County Library Special Collections.
Harold W. Mattke Diaries, M/A 0240. Hennepin County Library Special Collections. https://archives.hclib.org/repositories/2/resources/289 Accessed September 26, 2023.
Hundreds of archival collections documenting Minneapolis, Hennepin County, and World War II history can be viewed in Special Collections at Minneapolis Central Library. Some materials are available online in the Hennepin County Library Digital Collections.
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