Bird migration a general survey

af Berthold, Peter
Udgivet 2006

Bird migration: a general survey

af Bauer, Hans-Gunther; Translator, Berthold, Peter; Author, Westhead, Valerie; Translator
Udgivet 2001

Effects of climate change on birds

af Berthold, Peter; Editor, Fiedler, Wolfgang; Editor, Moller, Anders Pape; Editor
Udgivet 2010