Index of ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/SUNSPOT_REGIONS/USSR_Solar_Data
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![[DIR]](/icons/folder.gif) 1968 | 3.00b | July 16 2008 |
| 1969 | 3.00b | July 16 2008 |
| 1970 | 3.00b | July 16 2008 |
| 1971 | 3.00b | July 16 2008 |
| 1972 | 3.00b | July 16 2008 |
| 1973 | 3.00b | July 16 2008 |
| 1974 | 3.00b | July 16 2008 |
| 1975 | 3.00b | July 16 2008 |
| 1976 | 3.00b | July 16 2008 |
| 1977 | 3.00b | July 16 2008 |
| 1978 | 3.00b | July 16 2008 |
| 1979 | 3.00b | July 16 2008 |
| 1980 | 3.00b | July 16 2008 |
| 1981 | 3.00b | July 16 2008 |
| 1982 | 3.00b | July 16 2008 |
| 1983 | 3.00b | July 16 2008 |
| 1984 | 3.00b | July 16 2008 |
| 1985 | 3.00b | July 16 2008 |
| 1986 | 3.00b | July 16 2008 |
| 1987 | 3.00b | July 16 2008 |
| 1988 | 3.00b | July 16 2008 |
| 1989 | 3.00b | July 16 2008 |
| 1990 | 3.00b | July 16 2008 |
| 1991 | 3.00b | July 16 2008 |
| docs | 3.00b | July 16 2008 |