Ralph Niger (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Ralph Niger" in English language version.

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3books.google.com

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archive.org

Rankin, Susan; Hiley, David (1993). Music in the Medieval English Liturgy: Plainsong & Mediaeval Music Society Centennial Essays. Clarendon Press. pp. 250. ISBN 9780193161252. Radulfus Niger.

books.google.com

Morley, Henry (1888). English Writers: An Attempt Towards a History of English Literature. Vol. 3. Cassell. p. 184.
Berman, Harold J. (2009). Law and Revolution, the Formation of the Western Legal Tradition. Harvard University Press. p. 439. ISBN 9780674020856.
Thomson, Rodney M. (1989). Catalogue of the Manuscripts of Lincoln Cathedral Chapter Library. Boydell & Brewer. pp. 18–21. ISBN 9780859912785.