Gray, Ralph,  1931- <br/><br/>
Economic development of the United States / 
by Ralph Gray and John M. Peterson 
 - Rev. ed. 
 - Irwin :  Homewood,  1974 
 - xv, 626 p. :  ill. ;  24 cm. 
<br/><br/> In the 1969 ed. Peterson's name appeared first on the title page 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>025601549X 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Economic conditions