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<title>Estudio de una reciente perturbación cósmica registrada en el observatorio del Ebro</title>
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<namePart>Cirera, Ricardo</namePart>
<namePart type="date">(1864-1932)</namePart>
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<note type="statement of responsibility">por los P.P. Cirera y Mariano Balcells, S.J.</note>
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<topic>Actividad solar</topic>
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<topic>Anomalías magnéticas</topic>
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