@InCollection{Jadczyk:2005,
author
=
"P.Jadczyk and Z.Jakubiec",
title
=
"Zimowanie gawronów Corvus frugilegus w Polsce",
pages
=
"541--556",
year
=
"2005",
booktitle
=
"Ptaki krukowate Polski ISBN: 8389290928",
editor
=
"red. L. Jerzak, B. P. Kavanagh, P. Tryjanowski",
publisher
=
"Bogucki Wydaw. Naukowe",
address
=
"Poznań",
}