Nef, John Ulric,  1899- <br/><br/>
The United States and civilization / 
John U. Nef. 
 - 2nd ed. 
 - Chicago :  University of Chicago Press,  1967 
 - xvi, 435 p. ;  22 cm. 
<br/><br/> Open access. 
<br/><br/><label>LCCN: </label>6728465  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Civilization.<br/>United States--Civilization.