Wikipedia links to the Tariff of 1828 and the Nullification Crisis
South Carolina’s Exposition and Protest, 1828
The Tariff Act of 1828 and the Tariff Act of 1832 (the actual bills)
South Carolina Ordinance of Nullification, November 24, 1832
Daniel Webster: Liberty and Union, Now and Forever, One and Inseparable (26 January 1830)
