Data Represent Manufactured Cotton Textiles. Source: Unpublished Tabulation, For Description And Coverage Of Series See Robert E. Lipsey, "Price And Quantity Trends In The Foreign Trade Of The U.S.", NBER, 1963, Pp. 276-278.
This NBER data series q04209 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: q04209
Release: NBER Macrohistory Database
National Bureau of Economic Research, Price Index of Exports of Cotton for United States [Q04209USQ324NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q04209USQ324NNBR, February 12, 2016.