Mining Diamonds 1992 - 1994
Mining Diamonds 1987 - 1991
Mining Diamonds 1975 - 1986
Mining Coal 1993 - 1999
Mining Coal 1990 - 1992
Mining Coal 1986 - 1989
Mining Coal 1981 - 1985
Mining Coal 1975 - 1980
Mining Accidents 1996 - 1999