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Authors
- Ullrich, Fred, (Public health researcher) author3
- Ullrich, Fred, (Public health researcher), author1
- Ullrich, Fred, author19
- United States. Congress. House. Committee Appointed to Investigate the Local Causes of Cholera in the Arch Street Prison in the City of Philadelphia.1
- United States. Surgeon-General's Office.1
- Unruh, Mark, author1