%0 Journal Article %A A. Panzera %T Methods for Improving World Transportation Accounts, Applied to 1950 to 1953 - Karreman, H.F. %J Metrika %D 1964 %P 250-250 %V 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/MET_1964__8_175238/ %F MET_1964__8_175238