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Books about Claerbergen:
Renoir at the Theatre: Looking at La Loge (Courtauld Institute of Art Gallery) by Claerbergen, Ernst Vegelin van... (1000)
Wiki information Claerbergen:
Max Vegelin van Claerbergen is the founder of Biblionef and was the Dutch ambassador in Suriname in the early 1980's.
Dr. Ernst Vegelin van Claerbergen is Head of the Courtauld Gallery, London.