Land productivity and agro-systems in the North Sea area : Middle Ages-20th century, elements for comparison - Thoen, Erik, 1953-; Van Bavel, Bas J. P., 1964- (Turnhout : Brepols, 1999)
Includes bibliographical references.
Keywords: Agricultural productivity -- History -- Europe, Northern; Agricultural productivity -- History -- North Sea Region; Agriculture -- History -- North Sea Region