Columbia subject headings:
Confederate States of America--Commerce--Mexico--Izúcar de Matamoros--History.
Izúcar de Matamoros (Mexico)--Commerce--Confederate States of America--History.
United States--History--Civil War, 1861-1865--Blockades.
United States--History--Civil War, 1861-1865--Economic aspects--Southern States.
Harvard subject headings:
Confederate States of America--Commerce--Mexico--Izúcar de Matamoros--History.
Izúcar de Matamoros (Mexico)--Commerce--Confederate States of America--History.
United States--History--Civil War, 1861-1865--Blockades.
United States--History--Civil War, 1861-1865--Economic aspects--Southern States.
United States--History--Civil War, 1861-1865--Economic aspects.
Princeton subject headings:
Confederate States of America--Commerce--Mexico--Izúcar de Matamoros--History.
Izúcar de Matamoros (Mexico)--Commerce--Confederate States of America--History.
United States--History--Civil War, 1861-1865--Blockades.
United States--History--Civil War, 1861-1865--Economic aspects--Southern States.