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|  | When a historical record collection can be searched, the derivative type is “database,” “index,” or similar term. When a collection has digital images, “digital images” is the type of the derivative. Consider this citation to the death certificate of former president, Lyndon Baines Johnson:   |  | When a historical record collection can be searched, the derivative type is “database,” “index,” or similar term. When a collection has digital images, “digital images” is the type of the derivative. Consider this citation to the death certificate of former president, Lyndon Baines Johnson:   | 
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|  | :        1. “Texas Deaths, 1890-1976,” database and digital images, ''FamilySearch.org'' (<nowiki>http://www.familysearch.org</nowiki> : accessed 5 December 2009), search for Lyndon Baines Johnson, died 22 January 1973; death certificate 00340, Bexar County, Texas Bureau of Vital Statistics, Department of Health, 1100 West 49th Street, Austin, Texas. |  | :        1. “Texas Deaths, 1890-1976,” database and digital images, ''FamilySearch.org'' (<nowiki>http://www.familysearch.org</nowiki> : accessed 5 December 2009), search for Lyndon Baines Johnson, died 22 January 1973; death certificate 00340, Bexar County, Texas Bureau of Vital Statistics, Department of Health, 1100 West 49th Street, Austin, Texas. | 
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|  | Notice the different parts of the citation:   |  | Notice the different parts of the citation:   | 
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|  | The source of the source is even more important for databases without images. When a database does not have images, you cannot tell if there are indexing errors. The source of the source citation in the following example tells you where to get a photocopy of the original record.   |  | The source of the source is even more important for databases without images. When a database does not have images, you cannot tell if there are indexing errors. The source of the source citation in the following example tells you where to get a photocopy of the original record.   | 
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|  | :        2. “Idaho Marriages, 1842-1996,” ''Ancestry.com'' (<nowiki>http://www.ancestry.com</nowiki> : accessed 18 July 2010), search for Alonzo Raymond, married 1922; from “Upper Snake River Family History Center and Ricks College (Rexburg, Idaho),” citing “marriage book at the County Courthouse located in Bannock Co., ID in Volume 11 on Page 55.” |  | :        2. “Idaho Marriages, 1842-1996,” ''Ancestry.com'' (<nowiki>http://www.ancestry.com</nowiki> : accessed 18 July 2010), search for Alonzo Raymond, married 1922; from “Upper Snake River Family History Center and Ricks College (Rexburg, Idaho),” citing “marriage book at the County Courthouse located in Bannock Co., ID in Volume 11 on Page 55.” | 
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|  | Unlike the Texas Death example, this source of the source shows the typical practice. Simply “specify whatever the database gives as its source.”<ref>Mills, ''Evidence Explained'', 301.</ref>   |  | Unlike the Texas Death example, this source of the source shows the typical practice. Simply “specify whatever the database gives as its source.”<ref>Mills, ''Evidence Explained'', 301.</ref>   |