SOURCE-18189Research NeededProbable
Jim Bradbury, The Capetians, Kings of France 987-1328, (London: Hambledon Contin...
Full citation
Jim Bradbury, The Capetians, Kings of France 987-1328, (London: Hambledon Continuum, 2007), 24. ISBN 978-1-85285-528-4. Cited at Wikipedia, Robert the Strong