LONG-TERM TRANSFORMATIONS ASSESSMENT FOR THE LAKE ECOSYSTEMS OF THE NORTHERN EUROPE AND WESTERN SIBERIA BY THE METHOD
OF DIATOM COMPLEXES TAXONOMIC PROPORTIONS GRAPHIC ANALYSIS
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LONG-TERM TRANSFORMATIONS ASSESSMENT FOR THE LAKE ECOSYSTEMS OF THE NORTHERN EUROPE AND WESTERN SIBERIA BY THE METHOD
OF DIATOM COMPLEXES TAXONOMIC PROPORTIONS GRAPHIC ANALYSIS