DE GROOT Guillaume - Paul Saintenoy ( text ) : - Notice Biographique (sur) Guillaume De Groot ( sculpteur 1839 - 1922 ) , membre titulaire de l'Académie Royale de Belgique.

2. Bruxelles, Académie Royale, 1943, in-8°, Annuaire CIXe année, sewn, original printed wrapper. Unopened copy. Article of 15 pp published in the Academy's yearbook. With a photo portrait. Here the complete yearbook is on offer. It contains also five other biographical notices. Text in French. .