24 June 2012

Dzień Ziemi '2012
Institute of Physical Chemistry of the Polish Academy of Sciences
2012-06-24_GK0884 2012-06-24_GK0756 2012-06-24_GK0783
2012-06-24_GK0798 2012-06-24_GK0811 2012-06-24_GK0843