Mikrostruktury graptolitů rodu Geniculograptus (Courtesy of Denis Bates.) | ||
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Česky 
Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]
Mikrostruktury graptolitů rodu Geniculograptus (Courtesy of Denis Bates.) | ||