Avian Migration
Berthold, Peter; Gwinner, E.; Sonnenschein, E.
Migrating Raptors of the World: Their Ecology and Conservation
BILDSTEIN, Keith L
How Birds Migrate. Second edition
KERLINGER, Paul
Living on the Edge: Wetlands and Birds in a Changing Sahel
ZWARTS, Leo; BIJLSMA, Rob G.; VAN DER KAMP, Jan; WYMENGA, Eddy