Data Represent Petroleum And Products, Manufactured. Source: Unpublished Tabulation. For Description And Coverage Of Series See Robert E. Lipsey, Price And Durability Trends In The Foreign Trade Of The United States, NBER, 1963, P. 284.
This NBER data series q04210 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: q04210
Release: NBER Macrohistory Database
National Bureau of Economic Research, Price Index of Exports of Petroleum for United States [Q04210USQ324NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q04210USQ324NNBR/, November 26, 2015.