Basic maps of the U.S. Economy 1967-1990 :  Population. Employment. Income /. 

 - Washington :  National planning association,  1979. 
 - 293 p. :  maps ;  22 cm. 
<br/><br/><label>ISBN: </label>0-89068-050-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Population<br/>Employment<br/>Income