1.
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
A new representative of the lichid genus Ohleum (Trilobita) from the Eifelian (Middle Devonian) of southern Belgium ; Un nouveau représentant du genre lichidé Ohleum (Trilobita) de...
2.
Onset, growth, decline and decease of the Frasnian reefs and carbonate platform in the Frasnian of Belgium