Current unified text of Geological and Mining Law promulgated
Polish Parliament Speaker's announcement of 30 January 2015 contains unified text of Geological and Mining Law
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When the Polish shale rocks were formed?
... based on these fossils is the key and the best tool of stratigraphic correlation. Graptolites make it possible to determine the relative age of the ...
Artykuł - 10/29/2014 - 13:22