Bushnell, David (2011). "The Portrayal of Women on Stamps of Argentina, Colombia, Cuba, and the United States (1893–2006)". Women's Studies. 40 (7): 829. doi:10.1080/00497878.2011.603622. S2CID143702271.
Bushnell, David (2011). "The Portrayal of Women on Stamps of Argentina, Colombia, Cuba, and the United States (1893–2006)". Women's Studies. 40 (7): 829. doi:10.1080/00497878.2011.603622. S2CID143702271.