ბიებჟა: განსხვავება გადახედვებს შორის

* [http://bialowieza-biebrza.org/ Natural tourism (birdwatching) in Biebrza National Park] {{Webarchive|url=https://web.archive.org/web/20060204231711/http://www.bialowieza-biebrza.org/ |date=2006-02-04 }}

* [http://bialowieza.bialowieza.pl/serwer.map/index.html Topographical maps 1:50 000] {{Webarchive|url=https://web.archive.org/web/20110719005937/http://bialowieza.bialowieza.pl/serwer.map/index.html |date=2011-07-19 }}