Rogers, John Howard and Helen Norris Byrd. Ramblin' Rogers From Maryland to South Carolina to Alabama 
Ryan, Janet Claire Schindler. Descendants of Charles Colgan and Elizabeth Clarke 
Sarson, Steven James. Wealth, Poverty and Labor in the Tobacco Plantation South: Prince George's County, 
        Maryland, in the Early National Era 
Schleit, Philip. Washington City: People, Places, and Events in Two Centuries of History of the Capital of the 
        United States
Silent Sentinels of Aberdeen Proving Ground, Vol. 1, A Compilation in Two Volumes of Cemetery Grave Markers 
        of the Military and Private Cemeteries at Aberdeen Proving Ground, Maryland 
Smith, Ralph D. Early Ward Families of Southern Maryland, Vol. 3