@misc{Piechocki_Andrzej_(1938–_)_Beobachtungen_1975,
 author={Piechocki, Andrzej (1938– )},
 volume={20},
 number={14},
 copyright={Rights Reserved - Free Access},
 address={Warszawa},
 journal={Fragmenta Faunistica},
 howpublished={online},
 year={1975},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={ger},
 language={pol},
 language={rus},
 type={Text},
 title={Beobachtungen über den Bau von Laichen und die Fortpflanzung von Süsswasserschnecken aus den Familien: Physidae, Lymnaeidae and Planorbidae},
 URL={http://rcin.org.pl/miiz/Content/46942/PDF/WA058_50733_P256-T20_Frag-Faun-Nr-14.pdf},
 keywords={Planorbidae, Lymnaeidae, Physidae, Gastrooda, gastropods, snails, Mollusca, molluscs, eggs, species biology},
}