Keyword "MANGANOSE MIERALS" in:
Composition and origin of black coatings on the walls of dissolution cavities in the Čertovy schody Quarry near Koněprusy, Bohemian Karst
Zeman,A., Suchý,V., Melka,K., volume 30, 1997 (GRR for 1996), pages 138–140
pdf (0.5 MB)

