Source: Federal Reserve Board, Data For 1917-1933: Annual Report, 1928, Pp. 50-52; 1932, P. 52; 1933, P. 94. Data For 1934-1945: Banking And Monetary Statistics, P. 372. Data For 1946-1965: Supplement To Banking And Monetary Statistics, Pp. 56-60; And Federal Reserve Bulletins.
This NBER data series m14064 appears on the NBER website in Chapter 14 at http://www.nber.org/databases/macrohistory/contents/chapter14.html.
NBER Indicator: m14064
Release: NBER Macrohistory Database
National Bureau of Economic Research, Reserves Held At Federal Reserve Banks, All Member Banks for United States [M14064USM144NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M14064USM144NNBR/, July 3, 2015.