It is the 'Benezit' for short. Or 'E. Benezit: Dictionnaire des Peintres Sculpteurs Dessinateurs et Graveurs' There are even more extensive reference works such as 'Thieme Becker's Kuenstler Lexikon' Most people interested in researching an artwork are interested in $$'s. The best reference guide there is E, Mayer International Auction Records. It has literally hundreds of thousands listings. Ten
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