← Search Journal of Political Economy Vol. 29 No. 6 1921 The Crux of our Shipping Problem E. S. Gregg DOI10.1086/253366 Volume29 Issue6 Pages500-508 Languageen Sources semanticscholar openalex crossref Cite APA 7 MLA 9 Chicago (author–date) Harvard Elsevier Harvard (JFE, JBF…) The Accounting Review Academy of Management American Marketing Association INFORMS (Management Science) Copy citation Copied ✓