Riley-Smith, Jonathan, <br/><br/>
What were the crusades? / 
Jonathan Riley-Smith. 
 - 4th ed. 
 - San Francisco, CA :  Ignatius Press,  2009. 
 - xviii, 117 p. ;  pbk ;  22 cm. 
<br/><br/>Includes bibliographical references and indexes. 
<br/><br/>Preface --<br/>Preface to Second Edition --<br/>Preface to Third Edition --<br/>Preface to Fourth Edition --<br/>Map: The Theatres of War --<br/>What Were the Crusades? --<br/>A Just Cause --<br/>Legitimate Authority --<br/>Who Were the Crusaders? --<br/>When were the Crusades? --<br/>Chronology, 1095-1798 --<br/>Select Bibliography of Secondary Works --<br/>Index. 
<br/><br/><label>ISBN: </label>9781586173609 
<br/><br/><label>LCCN: </label>2008943571 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Crusades.<br/>Religion and civilisation.
<br/><br/><label>Dewey Class. No.: </label>909.07/RIL