La Valkyrie
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Bibliothèque municipale de Lyon {{cite web | url=http://www.europeana.eu/resolve/record/15801/06C9E76DFEC47D5A81C433BFDCA85FA0FCDBBFF7|title=La Valkyrie|author=Grasset, Eugène-Samuel, 1841-1917|accessdate=2013-05-20 |publisher=Europeana}}
<ref>{{cite web | url=http://www.europeana.eu/resolve/record/15801/06C9E76DFEC47D5A81C433BFDCA85FA0FCDBBFF7|title=La Valkyrie|author=Grasset, Eugène-Samuel, 1841-1917|accessdate=2013-05-20 |publisher=Europeana}}</ref>