1.

Les traces de pingos du Pays de Galles (Grande-Bretagne) et du Plateau des Hautes Fagnes (Belgique)

1.

Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge

2.

Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge

3.

Remnants of lithalsas of the hautes fagnes, Belgium: A summary of present-day knowledge

1.

Notes and Queries - volume 8, 3rd Series - Page 267

1.

Géomorphologie périglaciaire : textes des leçons de la Chaire Francqui belge ; Periglacial geomorphology : texts from the lessons of the Belgian Chaire Francqui