Martis, Kenneth C. <br/><br/>
The historical atlas of state power in Congress, 1790-1990 / 
Kenneth C. Martis, Gregory A. Elmes. 
 - Washington, D.C. :  Congressional Quarterly Inc.,  1993. 
 - 1 atlas (xv, 190 p.) :  col. ill., col. maps ;  27 cm. 
<br/><br/>Includes bibliographical references (p. 183-185) and index. 
<br/><br/><label>ISBN: </label>0871877422 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Election districts--History--Maps.--United States