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Mann, K (2007). "An African Family Archive: The Lawsons of Little Popo/Aneho (Togo), 1841-1938". The English Historical Review. CXXII (499): 1438–1439. doi:10.1093/ehr/cem350. ISSN0013-8266.
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Bushman, Richard Lyman (1998). "Markets and Composite Farms in Early America". The William and Mary Quarterly. 55 (3): 351–374. ISSN0043-5597.
Vickers, Daniel (1990). "Competency and Competition: Economic Culture in Early America". The William and Mary Quarterly. 47 (1): 3–29. doi:10.2307/2938039. ISSN0043-5597. JSTOR2938039.