Examples of landscape transformationin Fore-Pyrenean Catalonia (8th-12th century) as a result of man's influence on grapevine growth - Riu Riu, Manuel 1929- (Centre, region, periphery. (3) Medieval Europe Basel 2002. 3. Sections 6-8. [3rd International Conference of Medieval and Later Archaeology. Preprinted papers]., 2002)