1989.6-1997.9 1949.10-1997.9 19449.10-1997.9 1949.10—1997.9 1976.10-1997.9 1987.2-1997.2 1994.1-1997.9 1921.7-1997.9 1987.7-1997.7 1989.1-1990.1