RT Article T1 New challenges in public order policing: the professionalisation of environmental protest and the emergence of the militant environmental activist JF International journal of the sociology of law VO 30 IS 1 SP 17 OP 32 A1 Button, Mark 1969- A2 John, Tim A2 Brearley, Nigel LA English YR 2002 UL https://krimdok.uni-tuebingen.de/Record/1639226680 K1 Polizeiarbeit K1 Umweltbewegung K1 Private Sicherheit K1 Öffentliche Ordnung K1 Protestbewegung