J Lamens and F Geukens (1984)
Volcanic activity in the Lower Ordovician of the Stavelot Massif,Belgium
Académie royale de Belgique,Bulletin de la Classe des Sciences, vol. 46 p. 1-13.
10401, 171, 179, 180, Lx, CALSTAV, ORD, STRA, SEDI, PETSE
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