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Books about Heinzelin:
ONBEKENDE SCHATTEN UIT HET CHARLIER MUSEUM/TRESORS INCONNUE DU MUSEE CHARLIER:SCHENKINGEN... BLANCHE THIBAUT... by Jean de Heinzelin (2003)
Quaternary fish-fossils, (Institut des parcs nationaux du Congo belge. Exploration du parc national Albert. Mission... by Peter Humphry Greenwood (1959)
Wiki information Heinzelin:
Jean de Heinzelin de Braucourt was a Belgian geologist who worked mainly in Africa. He worked at the Universities of Ghent and Brussels. He gained international fame in 1960 when he discovered the Ishango Bone.