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NIJ standard for emergency vehicle sirens : a voluntary national standard promulgated by the National Institute of Justice
- "Emergency vehicle sirens"@en
- "Technology assessment program"@en
- "NIJ standard for emergency vehicle sirens : a voluntary national standard promulgated by the National Institute of Justice"@en
- "NIJ standard for emergency vehicle sirens"@en
- "NIJ standard for emergency vehicle sirens a voluntary national standard promulgated by the National Institute of Justice"@en