New challenges for migration policy in Central and Eastern Europe / ed. by Frank Laczko, Irene Stacher, Amanda Klekowski von KoppenfelsPeople on the Move in a Changing Climate: The Regional Impact of Environmental Change on Migration / Etienne Piguet and Frank Laczko (eds.)People on the move in a changing climate: the regional impact of environmental change on migration / Etienne Piguet, Frank Laczko, editors