Numerical Values and Print-outs for the 9.15-year Copper Price, U.S.A. Section of Alleged Economic Cycles of about 9.2 Years and a Study in Depth of this Cycle in Copper Prices, U.S.A., 1824-1973
Remarks on the Position and Prospects of the Copper Trade in England, as affected by the war between Spain and Chili. By Vivian and Younger [or rather by Edward Younger alone].