articles in the Dictionary of National Biography :
"Richard (d.1139) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard (d.1170) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard (d.1177?) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard (d.1184) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard (fl.1190) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard (1209-1272) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard (d.1360) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard (1411-1460) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard (d.1415) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard (1472-1483) ," in Dictionary of National Biography, 1885-1900 , London: Smith, Elder, & Co. (1885–1900) in 63 vols.
"Richard ," in Catholic Encyclopedia , (ed.) by Charles G. Herbermann and others, New York: The Encyclopaedia Press (1913)