The feudal transformation : 900-1200 /
Jean-Pierre Poly, Eric Bournazel ; translated by Caroline Higgitt.
- New York : Holmes & Meier, 1991.
- xvii, 404 p. : ill., maps ; 24 cm.
- Europe past and present series .
Translation of: La mutation fbeodale.
Includes bibliographical references (p. 359-396) and index.