Fogel, Robert William <br/><br/>
Time on the cross :  the economic of American Negro salvery 

 - Boston :  Little, Brown and Company,  1974 
 - xviii, 286 p. 
<br/><br/><label>ISBN: </label>CHS4671 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Slavery -  United States - Economic aspects
<br/><br/><label>Dewey Class. No.: </label>306.362