@misc{Drzymulska_Danuta_Status_2015,
 author={Drzymulska, Danuta},
 volume={71},
 number={3},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Let's protect Our Indigenous Nature},
 address={Kraków},
 howpublished={online},
 year={2015},
 publisher={Institute of Nature Conservation of the Polish Academy of Sciences},
 language={pol},
 title={Status troficzny jezior humusowych Wigierskiego Parku Narodowego – czy jest niezmienny w czasie?},
 title={The trophic status of humic lakes in Wigry National Park - is it time-invariant?},
 type={Text},
 URL={http://rcin.org.pl/iop/Content/125714/PDF/KR038_157014_r2015-t71-no3_ChPO-Drzymulska-192-198.pdf},
 keywords={Wigry National Park},
}