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Sur l'opportunité d'adopter une nouvelle échelle du Silurien, pour la Carte géologique officielle ; On whether to adopt a new scale Silurian for the official geological map
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Aye-Marche. Carte géologique de Wallonie à l'échelle 1:25.000. 54/7-8 ; Aye-Marche. Geological map of Wallonia (Belgium) at the scale of 1:10.000. 54/7-8
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Natoye-Ciney. Carte géologique de Wallonie. 48/3-4. Notice explicative ; Geological map of Wallonia (Belgium) at the scale of 1/25.000, Natoye-Ciney 54/1-2. Leaflet
Stratigraphy of the Lower Palaeozoic of the Brabant Massif, Belgium, part I : the Cambro-Ordovician from the Halle and Ottignies groups
Holland Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)
Holland Quadrangle ; 7.5 Minute Series (Topographic)
Holland Dam Quadrangle ; 7.5 Minute Series (Topographic)
Holland Dam Quadrangle ; Digital US Topo Maps: 7.5 Minute Series (Topographic)
Sabanno Quadrangle ; 7.5 Minute Series (Topographic)
San Saba Sheet ; 30 Minute Series
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