Columbia subject headings:
Crusades--Propaganda.
Crusades--Sermons.
Crusades.
Friars--Europe--History--To 1500.
Papacy--History--To 1309.
Preaching--History--Middle Ages, 600-1500.
Sermons, Medieval--History and criticism.
Harvard subject headings:
Crusades
Crusades--Propaganda.
Crusades--Sermons.
Friars--Europe--History--To 1500.
Papacy--History--To 1309
Preaching--History--Middle Ages, 600-1500
Sermons, Medieval--History and criticism
War--Religious aspects--Christianity
Princeton subject headings:
Crusades.
War--Religious aspects--Christianity.