RT Article T1 The Patterns and Prevalence of Mass Murder in Twentieth Century America JF Justice quarterly VO 21 IS 4 SP 729 OP 761 A1 Duwe, Grant 1971- LA Undetermined YR 2004 UL https://krimdok.uni-tuebingen.de/Record/1640340696 K1 Massenmord K1 Geschichte K1 Entwicklung