@mvbook{willis_slaves_1986, location = {London}, title = {Slaves and Slavery in Africa: Volume Two: The Servile Estate}, volume = {2}, isbn = {978-0-203-98817-6}, url = {https://doi.org/10.4324/9780203988176}, series = {Slaves and Slavery in Africa}, volumes = {2}, pagetotal = {198}, publisher = {Routledge}, author = {Willis, John Ralph}, date = {1986-12-31}, langid = {english}, note = {paid}, }