Bird migration a general survey

nork Berthold, Peter
Argitaratua 2006

Bird migration: a general survey

nork Bauer, Hans-Gunther; Translator, Berthold, Peter; Author, Westhead, Valerie; Translator
Argitaratua 2001

Effects of climate change on birds

nork Berthold, Peter; Editor, Fiedler, Wolfgang; Editor, Moller, Anders Pape; Editor
Argitaratua 2010