Keyword "ALGAL-RICH BEDS" in:

Identification of algal-rich beds and indicia of clay minerals in lacustrine deposits of Cypris Formation, Sokolov Basin, using optical spectroscopy in visible range (VIS)
Karel Martínek, Juraj Franců, Ondřej Bábek, Petr Rojík, Veronika Kopačková, volume 48, 2015 (GRR for 2014), pages 95–98
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