Biological Filters... Popular science publication. Online free: Multi-continent Trek to Discoveries.

Biological Filters... Popular science publication. Online free: Multi-continent Trek to Discoveries.
Biological filters are an important part of the biosphere // Science in Russia. 2009. No. 2. P. 30-36.
http://5bio5.blogspot.com/2013/07/biological-filters-popular-science.html
FULL TEXT ONLINE FREE:
http://sites.google.com/site/ostroumovsa/ostroumov-sa-biological-filters-are-an-important-part-of-the-biosphere--science-in-russia-2009--2-p-30-36;
http://www.scribd.com/doc/84318765
[The journal ‘Science in Russia’ is published by the Presidium of Russian Academy of Sciences, both in English and in Russian; Nauka Publishers, Moscow; ISSN 0869-7078. http://www.ras.ru, ©Russian Academy of Sciences Presidium.].
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