Columbia subject headings:
Crusades--Second, 1147-1149--Sources.
Lisbon (Portugal)--History--Siege, 1147--Sources.
Harvard subject headings:
Crusades--Second, 1147-1149--Sources.
Lisbon (Portugal)--History--Siege, 1147--Sources.
Princeton subject headings:
Crusades--Second, 1147-1149--Sources.
Lisbon (Portugal)--History--Siege, 1147--Sources.