1 Contents : 1978 Carnahan Conference on Crime Countermeasures ; may 17-19, 1978. - 1981 Carnahan Conference on Crime Countermeasures ; May 13-15, 1981. - 1984 Canahan Conference on Security Technology ; May 16-18, 1984. - 1989 Carnahan Conference on Security Technology ; Crime Countermeasures ; May 16-17, 1989