存档副本(PDF). [2009-03-14]. (原始内容(PDF)存档于2009-03-15). Consumer Price Index (CPI) Conversion Factors 1774 to estimated 2018 to Convert to Dollars of 2008, Robert Sahr, Associate Professor Oregon State University.
存档副本(PDF). [2009-03-14]. (原始内容(PDF)存档于2009-03-15). Consumer Price Index (CPI) Conversion Factors 1774 to estimated 2018 to Convert to Dollars of 2008, Robert Sahr, Associate Professor Oregon State University.