Potter, David Morris.
The impending crisis, 1848-1861 /
David M. Potter ; completed and edited by Don E. Fehrenbacher 
. - New York : Harper & Row,  1976 
. - x, 638 p.  ill.  20 cm. 
 - New American Nation series Harper torchbooks  TB 1929 .
<br/><br/> Автограф п. Deane Lundell..
<br/>К.: Бібліогр. : c. 584-621, Index 
<br/><label>  ISBN: </label>0-06-131929-5