TY - BOOK AU - Hess,Robert L. AU - Coger,Dalvan M. TI - Semper ex Africa : : A bibliography of primary source for nineteent h-century tropical Africa as recorded by explorers, missionaries, trade rs, travelers, administrators, military men, adventurers, and others / SN - 081792471X U1 - AF 016.9167 HES PY - 1972///] CY - [Stanford, Calif. : PB - Hoover Institution on War, Revolution, and Pe ace, KW - Civilization, Modern KW - 19th century KW - Sources KW - Bibliography KW - Africa, Sub-Saharan KW - History KW - To 1884 ER -