Proceedings of the 1989 American Control Conference : Proceedings of the 1982 American Control Conference : Proceedings of the 1984 American Control Conference : Proceedings of the 1985 American Control Conference : Proceedings of the 1986 American Control Conference : Proceedings of the 1987 American Control Conference : Proceedings of the 1988 American Control Conference : Proceedings of the 1991 American Control Conference : Proceedings of the 1992 American Control Conference : Proceedings of the american power conference