File(s): File format is application/pdf https://files.stlouisfed.org/files/htdocs/publications/review/74/08/Usury_Aug1974.pdf

File(s): https://fraser.stlouisfed.org/scribd/?toc_id=499485&filepath=/docs/publications/frbslreview/rev_stls_197408.pdf&start_page=16#scribd-open