@misc{,
 volume={Year 1930/1931},
 copyright={Public Domain},
 howpublished={online},
 language={pol},
 type={Text},
 URL={http://rcin.org.pl/Content/183888/PDF/WA488_218434_P1765_Rocznik-30-31.pdf},
 keywords={Polish Academy of Arts and Sciences - history, Polish scientific periodicals - 20 c.},
}