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Ballester, J. L.; Priest, E. R:. , "The fibril structure of solar prominences". "European Geophysical Society General Assembly", Barcelona, Spain, 1989. Paper presentation.
Ballester, J. L.; Priest, E. R:. , "Fibril structure of solar prominences". "IAU Colloquium 'Dynamics of Prominences'", Hvar, Yugoslavia, 1989. Paper presentation.
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