xBookUtils.terms['fn_39_501'] = "Clark, Gerald. 1969. \"What Happens When the Police Go On Strike.\" New York Times Magazine, November 16, sec. 6: 45, 176-185, 187, 194-195.";
xBookUtils.terms['fn_39_502'] = "Klick, Jonathan, & Alexander Tabarrok. 2005. \"Using Terror Alert Levels to Estimate the Effect of Police on Crime.\" Journal of Law & Economics, 48(1): 267-280.";