@misc{Willer_Alfred_(1889-1952)_Die,
 author={Willer, Alfred (1889-1952)},
 address={[s.l]},
 howpublished={online},
 publisher={[s.n.]},
 language={ger},
 title={Die kleine Maräne (Coregonus albula L.) in Ostpreussen},
}