https://stat.gov.pl/cps/rde/xbcr/gus/se_ochrona_srodowiska_2010r.pdf
Cited 1 Dec 2018
Central Statistical Office of Poland. (2011). Statistical information –
environmental protection (ochrona srodowiska). CSOP, Warsaw, Poland.
314. Available fromhttps://stat.gov.pl/cps/rde/xbcr/gus/se_ochrona_srodowiska_2011.pdf
Cited 1 Dec 2018
Central Statistical Office of Poland. (2012). Statistical information –
environmental protection (ochrona srodowiska). CSOP, Warsaw, Poland.
311. Available from