@misc{Kasprzak_Krzysztof_An_1977, author={Kasprzak, Krzysztof}, volume={33}, number={1}, editor={Research Centre for the Protection of Nature of the Polish Academy of Sciences}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Warszawa}, address={Kraków}, journal={Let's protect Our Indigenous Nature}, howpublished={online}, year={1977}, publisher={Państwowe Wydawnictwo Naukowe}, language={pol}, type={Text}, title={An appeal for the preservation of the nature reserves in the lower stretches of the Wełna river}, URL={http://rcin.org.pl/iop/Content/147992/PDF/KR038_182062_r1977-t33-no1_ChPO-Kasprzak-60-66.pdf}, }