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Mögliche Variationen in der Intensität der Fraunhoferschen Linien.(Mitteilung aus dem Heliophysikalischen Institut des Physikalischen Laboratoriums Utrecht.)
Bart Hellinckx/Frank Simon/Marc Depaepe: The Forgotten Contribution of the Teaching Sisters. A Historiographical Essay on the Educational Work of Catholic Women Religious in the 19th and 20th Centuries. Leuven: Leuven University Press 2009 (120 S.)[Rezension]