== Referencer ==
{{Reflist}}
* Frederick J. Blue; ''Salmon P. Chase: A Life in Politics'' 1987
* Frederick J. Blue. ''The Free Soilers: Third Party Politics, 1848-54'' (1973)
* Martin Duberman; ''Charles Francis Adams, 1807-1886'' 1968.
* {{cite book | last = Foner | first = Eric | author-link = | title =  Free Soil, Free Labor, Free Men: The Ideology of the Republican Party before the Civil War| publisher = Oxford University Press | date = 1995 edition;  originally published 1970| location = New York | pages = | url =https://archive.org/details/freesoilfreelabo01fone| doi = | id = | isbn = 0195094972 }}
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