@misc{Dyrcz_Andrzej_Ornithological_1969,
 author={Dyrcz, Andrzej and Tomiałojć, Ludwik (1939– )},
 volume={25 nowa seria},
 number={4},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 journal={Let's protect Our Indigenous Nature},
 address={Kraków},
 howpublished={online},
 year={1969},
 publisher={Polish Academy of Sciences},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={pol},
 title={Ornithological aspects of the protection of marshes on the Biebrza river},
 type={Text},
 URL={http://rcin.org.pl/Content/124095/PDF/KR038_143014_r1969-t25-no4_ChPO-Dyrcz-38-42.pdf},
 keywords={Biebrza Marshes, Czerwone Bagno, Bagno Ławki, Bagno Podlaskie},
}