Data Are From Reports Of 16 Manufacturers Who Produced Over 99 Per Cent Of The Total Architectural Terra Cotta Made In 1929. Source: U.S. Bureau Of The Census, "Terra Cotta" Releases Of January 28, 1932 And Following.
This NBER data series m06035 appears on the NBER website in Chapter 6 at http://www.nber.org/databases/macrohistory/contents/chapter06.html.
NBER Indicator: m06035
Release: NBER Macrohistory Database
National Bureau of Economic Research, New Orders of Architectural Terra Cotta for United States [M06035USM601NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M06035USM601NNBR/, August 31, 2015.