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Spring 3100 is a magazine published by the New York Police Department for current and retired members of the service. It was first published in March 1930. The name comes from the very old phone number for calling the NYPD, SPring 7-3100. Before 1971 the magazine enjoyed higher levels of circulation and had 35,000 subscribers.
- "Police Department Magazine Struggling to Survive". The New York Times. 6 December 1977. Retrieved 12 February 2017.
- "Some NYPD Publications". Lloyd Sealy Library. Archived from the original on 13 February 2017. Retrieved 12 February 2017.
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