Henk Lammerts,Assen

02/06/1981 12/06/1981 13/06/1981 02/09/1981 05/09/1981 15/09/1981 15/05/1982 01/06/1982 04/06/1982 05/06/1982 24/06/1982 03/07/1982 07/05/1983 13/05/1983 24/07/1984 28/07/1984