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| adverts |  |
 1968 |
 1969 |
 1969 |
 1970 |
 1971 |
 1971 |
 1974 |
 1977 |
 1977 |
 1979 |
 1979 |
 1979 |
 1980 |
 1980 |
 1980 |
 1981 |
 1981 |
 1982 |
 1984 |
 1985 |
 1985 |
 1989 |
 1989 |
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| adverts | |
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1968 |
1969 |
1969 |
1970 |
1971 |
1971 |
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1974 |
1977 |
1977 |
1979 |
1979 |
1979 |
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1980 |
1980 |
1980 |
1981 |
1981 |
1982 |
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1984 |
1985 |
1985 |
1989 |
1989 |