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Hodson |
1954b |
The beds above the Carboniferous Limestone in North-West County Clare, Eire.
Quarterly Journal of the Geological Society of London, 109 (3): 259-283, fig.1-8, pl.11-12; London.
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Hodson & Leckwijck |
1958 |
A Namurian Marker-Horizon at Büsbach, near Aachen, Western Germany.
Association pour l'Etude de Paléontologie et de la Stratigraphie Houillères, Publication 35: 1-13, fig.1-3, pl.A-B; Bruxelles.
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