Man), 1981 (ISBN 978-0-393-31425-0) Elazar Barkan, The retreat of scientificracism : changing concepts of race in Britain and the United States between
University Press, (ISBN 978-0-8387-5257-9), p. 154 « Phrenology and "ScientificRacism" in the 19th Century » [archive du 28 février 2018], Vassar College
lire en ligne), « The role of experts in scientific controversy » Barkan, Elazar, The Retreat of ScientificRacism : Changing Concepts of Race in Britain