307.760973
Gre
M
Greenwood , Michel J
Migration and economic growth in the United States : national , regional , and metropolitan , perspectives / Michael J. Greenwood .-- New York : Academic , 1981.
xiii , 233 p. : tabs. ; 23 cm. -- (Studies in urban economics) 
" References " : p. 223 - 230 
ISBN 0- 12 - 300650 - 3