Fogel, Robert William. <br/><br/>
Time on the cross  the economics of American Negro slavery 
by Robert William Fogel and Stanley L. Engerman. 
 - Boston  Little, Brown  [1974] 
 - xviii, 286 p.  illus. 
<br/><br/><label>ISBN: </label>0316287008 
<br/><br/><label>LCCN: </label>73018347 //r903 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Slavery--Economic aspects--United States.<br/>Slavery--Econometric models.--United States
<br/><br/><label>LC Class. No.: </label>E449  / .F65 1974 
<br/><br/><label>Dewey Class. No.: </label>331.1/1734/0973