Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Bowley, A. L. (Arthur Lyon), Sir and League of Nations. Secretariat. Economic and Financial Section",Estimates of the working population of certain countries in 1931 and 1941,,League of Nations,1926,Publications of the League of Nations,,,,https://cir.nii.ac.jp/crid/1130000797906101632