By K. Levitan
By D. Neubauer, K. Kuroda
By A. Triandafyllidou, Kenneth A. Loparo
By Irial Glynn, J. Kleist
By W. Ascher, J. Heffron
By E. Colombo, P. Rebughini
By J. Kantner
By Ira Berlin (University of Maryland College Park)
By Stephen Castles, Mark J. Miller
By Adrian Favell
By Chris Rolfe, Clare Rolfe, Malcolm Harper
By Guy Halsall (University of York)
By Sarah Harper (Professor of Gerontology, Oxford University and Director of the Oxford Institute of Population Ageing)
By Shane White, Graham White
By Bruce Berman (Author), Will Kymlicka (Royalty Account), Professor Dickson Eyoh (Royalty Account)
By Paul Collier
By Anita H. Fabos
By Carlton Howson, Momodou Sallah
By Catherine Coquery-Vidrovitch, David Maisel
By Stuart Hall (Author)
By John C. Caldwell, B.K. Caldwell, P. Caldwell, P.F. McDonald, T. Schindlmayr
By Melissa Fleming
By Mustafa, Nujeen, Lamb, Christina
By William Harwood
By Anne Jones, RGN Bpsn Bsc(hons) (Oral and Facial Surgery Department, Sunderland Royal Hospital, Sunderland, UK)
By Adepoju, Aderanti
By Patrick Manning (Professor, University of Pittsburgh)
By Robert S. Leiken (Director, Immigration and National Security Program, Director, The Nixon Center)
By Isidore Okpewho, Carole Boyce Davies, Ali A. Mazrui
By Stephen Castles, Alastair Davidson