Source: Data For 1921-1934: Direct From The Tanners' Council Of America. Data For 1935-1956: U.S. Department Of Commerce, Survey Of Current Business, 1938 Supplement, P. 124, And Subsequent Supplements.
This NBER data series m01221 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: m01221
Release: NBER Macrohistory Database
National Bureau of Economic Research, Cattle Hide and Kip Leather Production for United States [M01221USM414NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M01221USM414NNBR/, July 1, 2015.