00369nam a2200121Ia 4500008004100000020001800041040001300059082001500072100001600087245008100103260004800184300001500232191130s2004##################000#0#eng##  a9780521525022  aACLcACL  a630.02 TIT  aTitow, J. Z  aWinchester yields : a study in medieval agricultural productivitycJ Z Titow  aCambridgebCambridge University Pressc2004  aviii, 151p