Elements of criminal investigation / Paul B. Weston [and] Kenneth M. Wells. Weston, Paul B. Wells, Kenneth M., joint author. Criminal investigation. HV8073 .W45 364.12 NEE Englewood Cliffs, Prentice-Hall : 1971. 1971. 1971 Text ix, 113 p. : eng Prentice-Hall essentials of law enforcement series