исторические обменные курсы
Currency conversion tables: a hundred years of change  by R. L. Bidwell. London, Rex Collings Ltd., 1970

British historical statistics by B.R. Mitchell. Cambridge [Cambridgeshire]. New York Cambridge University Press.1988

Money and exchange in Europe and America, 1600-1775 : a handbook by John J. McCusker. Chapel Hill, N.C. : Published for the Institute of Early American History and Culture, Williamsburg, Va., by the University of North Carolina Press, c1978