Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
United States. Bureau of Labor Statistics,"History of wages in the United States from colonial times to 1928 : revision of bulletin no. 499 with supplement, 1929-1933 (page 523)",,United States Government Printing Office,1934,Bulletin,,,,https://cir.nii.ac.jp/crid/1130282271576334592