@misc{Bonsdorff_Ilmari_Resultate_1922,
 author={Bonsdorff, Ilmari},
 address={Helsinki},
 howpublished={online},
 year={1922},
 publisher={Suomalaisen Tiedeakatemian Kustantama},
 language={ger},
 title={Resultate der Absoluten Deklinationsbestimmungen des Pilkowoer Katalogs 1915},
 keywords={star catalogue, Pulkova star catalogue, the epoch 1915.0.},
}