Greenberg, S. Edward. <br/><br/>
The American political system :  a radial approach / 
by Edward S. Greenberg. 
 - 5th ed. 
 - San Francisco, Calif. :  HarperCollins,  1986. 
 - xiii, 392 p. : ill. 
<br/><br/><label>ISBN: </label>0673398889 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Political science.<br/>Business and politics--United States.<br/>Marxian economics.<br/>United States--Politics and government--1945-.<br/>United States--Economic conditions--1945.