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Rasmussen, Wayne D. (January 1955). "Diplomats and Plant Collectors: The South American Commission, 1817–1818". Agricultural History. 29 (1). Agricultural History Society: 22–31.
Weeks, William Earl (2002). John Quincy Adams and American Global Empire. University Press of Kentucky. ISBN9780813190587.
Willis, H. Parker (1903). "Reciprocity of Cuba". American Academy of Political and Social Science. 22: 129–147. doi:10.1177/000271620302200110.
