1. The Degeneration of Our Presidential Elections: A History and Analysis of an American Institution in Trouble;Abels,1938
2. Interpreting and Using Regression;Achen,1982
3. The United States in the World-Economy: A Regional Geography;Agnew,1987
4. American Business Activity from 1790 to Today;Ameri Trust Company,1987
5. The Creation of a Democratic Majority, 1932–1936;Anderson,1979