Jefferson's visit to Bordeaux is given in the history of Château Lafite: .
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Liu, L., Cozzolino, D., Cynkar, W. U., Gishen, M. & Colby, C. B. 2006. Geographic classification of Spanish and Australian tempranillo red wines by visible and near-infrared spectroscopy combined with multivariate analysis. Journal of Agricultural and Food Chemistry 54(18): 6754–59.