Columbia subject headings:
Bombings--England--Guildford--History--20th century.
Terrorism--England--Guildford--History--20th century.
Harvard subject headings:
Bombing investigation--England--Guildford.
Guildford (England)--History.
Provisional IRA--History.
Princeton subject headings:
Bombings--England--Guildford--History--20th century.
Terrorism--England--Guildford--History--20th century.