Hanna, Frank Allan,  1907-. <br/><br/>
State income differentials, 1919-1954. 

 - Durham, N. C. :  Duke University Press,  1959. 
 - xix, 268 p. :  diagrs., tables. ;  24 cm. 
<br/><br/> 'The final report of the Study of differences in State per capita incomes, which was supported jointly by Duke University and the Rockefeller Foundation.' 
<br/><br/>Bibliographical footnotes. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Income--United States.