United States. Bureau of Labor Statistics
and United States. Department of State.
Public Old-Age Pensions and Insurance in the United States and in Foreign Countries : Bulletin of the United States Bureau of Labor Statistics, No. 561 ,
Washington:
U.S. Govt. Print. Off.,
February 1932, https://fraser.stlouisfed.org/title/4098,
accessed on March 20, 2025.
@FedFRASER