Walker, Samuel
The police in America : an introduction
McGraw-Hill, 1992
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Sullivan, John L.
Introduction to police science
McGraw-Hill, 1977
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Smith, Bruce
Police systems in the United States
Harper & Brothers, 1960
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Thinking about police : contemporary readings / edited, Carl B.Klockars
McGraw-Hill, 1993
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Swank, Calvin J.
The police personnel system / Calvin J. Swank and James A. Conser
John Wiley & Sons, 1983
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