United States. President and Council of Economic Advisers (U.S.). "Chain-Type Price Indexes for Gross Domestic Product," in United States. President and Council of Economic Advisers (U.S.). "2006," Economic Report of the President (2006) : 281-282. https://fraser.stlouisfed.org/title/45/item/8105/toc/261583 , accessed on March 19, 2024.