Fogel, Robert William. <br/><br/>
Time on the cross :  the economics of American Negro slavery / 
by Robert William Fogel and Stanley L. Engerman. 
 - New York :  Norton,  1989, c1974. 
 - xviii, 306 p. :  ill. ;  20 cm. 
<br/><br/> American Window.  Reprint. Originally published: Boston, Mass. : Little, Brown, c1974. 
<br/><br/>Includes bibliographical references (p. [274]-279) and index. 
<br/><br/><label>ISBN: </label>0393306208 :  $8.95 ($11.95 Can.) 
<br/><br/><label>LCCN: </label>89035275 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Slavery--Economic aspects--United States.
<br/><br/><label>LC Class. No.: </label>E449  / .F65 1989 
<br/><br/><label>Dewey Class. No.: </label>331.11/734/0973