De EconomistDecember 1931, Volume 80, Issue 1, pp 507–511 | Cite asNaschriftAuthorsAuthors and affiliationsH. W. C. BordewijkArticle 12 Downloads This is a preview of subscription content, log in to check access.PreviewUnable to display preview. Download preview PDF.Unable to display preview. Download preview PDF.Copyright information© De Erven F. Bohn N.V. 1931Authors and AffiliationsH. W. C. BordewijkThere are no affiliations available