Prothero, R. Mansell <br/><br/>
Public health, pastoralism, and politics in the horn of Africa. 

 - 26 p.  maps. 
<br/><br/> The sixth Melville J. Herskovits memorial lecture delivered under the auspices of the program of African studies, Northwestern university, on 9 October 1967, by R. Mansell Prothero, reader in geography