White Lynn.«Technology and Invention in the Middle Ages». Speculum, vol. XV, 1940.

Wilkins Ernest Hatch.Petrarch’s Eight Years in Milan. Cambridge, 1958.

Workman Herbert.John Wyclif: A Study of the Medieval Church. Oxford, 1926.

Wright Edith.«Medieval Attitudes Toward Mental Illness». Bull, of the History of Medicine, vol. VII, no. 3, March 1939.

Wright Thomas.A History of Domestic Manners and Sentiment in England. London, 1862,

Wulf Maurice de.Philosophy and Civilization in the Middle Ages. Princeton, 1922.

Wylie James Hamilton.The Reign of Henry the Fifth. 3 vols. Cambridge, 1919.

Zacour Norman P.«Talleyrand: The Cardinal of Perigord 1301–1364», Trans, of Am. Philosophical Soc. New Series, vol. 50, part 7. Philadelphia, 1960.

Ziegler Philip.The Black Death. New York, 1969. (The best modern study.)

Zurlauben, Baron von Thum und.«Histoire d’Arnaut de Cervole, dit l’Archipr^etre». Histoire de l’Acad'emie royale des inscriptions et belleslettres, vol. XXV. Paris, 1759.