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1.
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Title: 1900 United States Federal Census
Page: Database online. Hamilton, Ohio, ED 198, roll T623 1279, page 4A.
Author: Ancestry.com
Publication: Name: The Generations Network, Inc.; Location: Provo, UT, USA; Date: 2004;
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2.
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Title: Theophil Haas
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3.
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Title: 1910 United States Federal Census
Page: Database online. Cincinnati Ward 14, Hamilton, Ohio, ED , roll T624_1190, part , page .
Author: Ancestry.com
Publication: Name: The Generations Network, Inc.; Location: Provo, UT, USA; Date: 2006;
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4.
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Title: U.S. Census. 1900. Hamilton County, Cincinnati, Ohio Enum. District 198, Sheet 4
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5.
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Title: Haas, Theophil. Telephone interview to Michael Haas. February 21, 1998
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