The Monroe doctrine and American expansionism, 1843-1849 / Frederick Merk with the collaboration of Lois Bannister Merk. Merk, Frederick 1887- Monroe doctrine. 973.58 MEM Includes bibliographical references in index. New York : Knopf, 1966. 1966. 1966 Text xii, 289, ix p. : eng United States Foreign relations 1845-1849. United States Territorial expansion.