Encyclopaedia Britannica Online

International Encyclopedia of the Social Science C61/Si35.2(v.1-9) 2008

International Studies Encyclopedia D81-61/In8d(V.1-12) 2010

Wikipedia: academic use 

Cambridge Histories of Africa（Vol.1-8）K4/C144
Encyclopedia of African History (Vol.1-3) K4-61/En19s
Encyclopedia of the Modern Middle East and North Africa  (vol.1-4) K37-61/En19.2
Encyclopedia of twentieth-century African history  K405-61/En19
New Encyclopedia of Africa (订购中)