Johnston, H. A. S. Deham in Bornu - Pittsburgh : Duquesne University Press, 1973 - 266p. : ill. ; 23cm. ISBN: 0391003143 Subjects--Topical Terms: BornuDescription and travelSaharaDenhamDixon1786-1828OudneyWalter 1790-1829ClappertonHugh 1788-1827 LC Class. No.: DT515.9.B6J63