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Ancestry.com. Durell's Battery in the Civil War [webbaserad databas]. Provo, UT: Ancestry.com Operations Inc, 2005.
Originaldata: Cuffel, Charles A.. Durell's Battery in the Civil War : (Independent Battery D, Pennsylvania Volunteer Artillery) : a narrative of the campaigns and battles of Berks and Bucks Counties' artillerists in the War of the Rebellion, from the battery's organization, September 24, 1861, to its muster out of service, June 13, 1865. Philadelphia: Craig, Finley & Co., printers and lithographers, 1900.