[29] The author is thankful for the possibility to use the OMNI database of the National Space Science Data Center and the data of the Yohkoh satellite presented in the Web. The NSO/Kitt Peak data used here were produced cooperatively by NSF/NOAO, NASA/GSFC, and NOAA/SEL. Data used here from Mees Solar Observatory, University of Hawaii, are produced with the support of NASA grant NAG 5-4941 and NASA contract NAS8-40801.
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