Appendix D: Patterns of Exports and World Imports in Individual U.S. Business Cycles and Average Patterns for Two Periods

Ilse Mintz, American Exports during Business Cycles, 1879–1958 (NBER, 1961), https://www.nber.org/books-and-chapters/american-exports-during-business-cycles-1879-1958/appendix-d-patterns-exports-and-world-imports-individual-us-business-cycles-and-average-patterns-two.