Pirenne,Henri.   <br/><br/>
Medieval cities : their origins and the revival of trade   
by Henri Pirenne 
 - Princeton, New Jersey   Princeton University Press;   c1952. 
 - xii,253p;  18cm. 
<br/><br/><label>ISBN: </label>0691007608 
<br/><br/><label>Dewey Class. No.: </label>CB 301.363  / PIR