Kramer, Helen M. (1964). "Harvesters and High Finance: Formation of the International Harvester Company". Business History Review. 38 (3): 283–301. doi:10.2307/3112159. JSTOR3112159.
Shapiro, Helen (Winter 1991). "Determinants of Firm Entry into the Brazilian Automobile Manufacturing Industry, 1956–1968". The Business History Review. 65 (4, The Automobile Industry): 876–947. doi:10.2307/3117267. JSTOR3117267. S2CID153363903.
Kramer, Helen M. (1964). "Harvesters and High Finance: Formation of the International Harvester Company". Business History Review. 38 (3): 283–301. doi:10.2307/3112159. JSTOR3112159.
Shapiro, Helen (Winter 1991). "Determinants of Firm Entry into the Brazilian Automobile Manufacturing Industry, 1956–1968". The Business History Review. 65 (4, The Automobile Industry): 876–947. doi:10.2307/3117267. JSTOR3117267. S2CID153363903.
Shapiro, Helen (Winter 1991). "Determinants of Firm Entry into the Brazilian Automobile Manufacturing Industry, 1956–1968". The Business History Review. 65 (4, The Automobile Industry): 876–947. doi:10.2307/3117267. JSTOR3117267. S2CID153363903.
Goldfarb, Bruce (2020). 18 Tiny Deaths: The Untold Story of Frances Glessner Lee and the Invention of Modern Forensics. Waterville, Maine: Sourcebooks. p. 19. ISBN9781492680475. OCLC1096529139.