NAVISTAR SCHOOL BUS CHASSIS 1979 (1) (RSS) 1980 (1) (RSS) 1981 (1) (RSS) 1982 (1) (RSS) 1983 (1) (RSS) 1984 (1) (RSS) 1985 (1) (RSS) 1986 (1) (RSS) 1987 (1) (RSS) 1988 (1) (RSS) 1989 (1) (RSS) 1990 (1) (RSS) 1991 (1) (RSS) 1992 (1) (RSS)