1086/643524. Wallace, Lew. Life and Public Services of Benjamin Harrison. Edgewood Publishing Company. 1888. Williams, R. Hal. Benjamin Harrison 1889–1893
Chemie, System Nr. 71, Transurane, Teil B 1, S. 57–67. Wolfgang H. Runde, Wallace W. Schulz: Americium (页面存档备份,存于互联网档案馆), in: Lester R. Morss, Norman M.
Sawyer 1958:Irving C. Gardner 1959:John D. Strong 1960:James G. Baker 1961:Wallace R. Brode 1962:David MacAdam 1963:Stanley S. Ballard 1964:Richard C. Lord