 Open-cast mining and metallurgical activities were mostly concentrated in the Eastern Alps, Saxony, Bohemia, Tuscany, the Rhineland, Gaul  and Spain (Nef 1987).
<fluency>  Open-cast mining and metallurgical activities were mostly concentrated in the Eastern Alps, Saxony, Bohemia, Tuscany, the Rhineland, Gaul  and Spain (Nef 1987).
 Open-cast mining and metallurgical activities were mostly concentrated in the Eastern Alps, Saxony, Bohemia, Tuscany, the Rhineland, Gaul , and Spain (Nef 1987).