@misc{Birkenmajer_Krzysztof_Lower_1967, author={Birkenmajer, Krzysztof}, volume={R. 32}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Kraków}, journal={Protection of Nature}, howpublished={online}, year={1967}, publisher={Nature Protection Research Centre of the Polish Academy of Sciences}, publisher={Państwowe Wydawnictwo Naukowe}, language={pol}, title={Lower Silesian basalts as monuments of inanimate nature}, type={Text}, URL={http://rcin.org.pl/iop/Content/240722/KR038_275989_r1967-r32_OP-Brikenmajer-225-276.pdf}, keywords={basalts, Lower Silesia (Poland)}, }