Index of ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/SUNSPOT_REGIONS/Yunnan
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![[DIR]](/icons/folder.gif) 1981 | 4.00b | July 15 2008 |
| 1982 | 4.00b | July 15 2008 |
| 1983 | 4.00b | July 15 2008 |
| 1984 | 4.00b | July 15 2008 |
| 1985 | 4.00b | July 15 2008 |
| 1986 | 4.00b | July 21 2008 |
| 1987 | 4.00b | July 15 2008 |
| 1988 | 4.00b | July 15 2008 |
| 1989 | 4.00b | July 15 2008 |
| 1990 | 4.00b | July 15 2008 |
| 1991 | 4.00b | July 15 2008 |
| 1992 | 4.00b | July 15 2008 |
| docs | 5.00b | July 15 2008 |