Columbia subject headings:
Oxford City Police.
Police discretion--England--Oxford.
Police discretion--England--Salford (Lancashire)
Salford (Greater Manchester, England)--Police.
Harvard subject headings:
Oxford (England)--Police.
Police discretion--England--Oxford.
Police discretion--England--Salford (Greater Manchester)
Police discretion--England--Salford.
Police--England--Oxford.
Police--England--Salford (Greater Manchester)
Princeton subject headings:
Police discretion--England--Oxford.
Police discretion--England--Salford (Greater Manchester)
Police--England--Oxford.
Police--England--Salford (Greater Manchester).