A R Gillis

John Hagan, professor at Northwestern University, is the author of Structural Criminology and other books on crime. A. R. Gillis and David Brownfield are professors in the Sociology Department at the University of Toronto. John Hagan, professor at Northwestern University, is the author of Structural Criminology and other books on crime. A. R. Gillis and David Brownfield are professors in the Sociology Department at the University of Toronto. John Hagan, professor at Northwestern University, is the author of Structural Criminology and other books on crime. A. R. Gillis and David Brownfield are professors in the Sociology Department at the University of Toronto. John Hagan, professor at Northwestern University, is the author of Structural Criminology and other books on crime. A. R. Gillis and David Brownfield are professors in the Sociology Department at the University of Toronto.