1.
The uppermost Famennian Hangenberg Event in the Namur–Dinant Basin (southern Belgium)
The Hangenberg Event (uppermost Famennian) in southern Belgium (Namur-Dinant Basin)
Contribution scientifique et administrative: Cadre géologique ; Scientific and administrative contributions: Geological setting
Carte géologique manuscrite de Spa (49/4) à l'échelle de 1:10.000 ; Handwritten geological map of Spa (49/4) at a scale of 1: 10,000
Huy-Nandrin. Carte géologique de Wallonie. 48/3-4. Notice explicative ; Huy-Nandrin. Geological map of Wallonia. 48/3-4. Leaflet