← Search Journal of Political Economy Vol. 40 No. 6 1932 English Trade in the Middle Ages. L. F. Salzman M. M. Knight DOI10.1086/254417 Volume40 Issue6 Pages837-838 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 ✓