Leonard Plugge: Difference between revisions

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* {{Cite book|title=And the World Listened: The Biography of Captain Leonard F. Plugge – A Pioneer of Commercial Radio|last=Wallis|first=Keith|publisher=Kelly Publications|year=2008|isbn=978-1-9030-5323-2}}

* {{Cite book|title=Uw naam is Plug(ge)?|last=Plugge|first=Joost|publisher=Quoad Fornam|year=1990|isbn=90-6851-003-7|location=Leende}}