Keyword "ASTURIAN" in:

Results of the geological investigation of the Kladno Formation north of Nýřany in 2007–2021
Jan Bureš, Robert Slunčík, volume 54, issue 2, 2021, pages 123–134
pdf (23.02 MB)

Volcanogenic interlayer (tonstein) in the Main coal seam of the Nýřany group of seams (Asturian) in the Plzeň region
Pešek,J., Drábková,J., Martinec,P., Sýkorová,I., volume 44, 2011 (GRR for 2010), pages 36–38
pdf (0.31 MB)