Springer, John McKendree. <br/><br/>
The heart of Central Africa :  mineral wealth and missionary opportunity / 
by John M. Springer ; with an introduction by Bishop J.C. Hartzell. 
 - Cincinnati : New York :  Cincinnati : New York :  Jennings & Graham ; Eaton & Mains,  Jennings & Graham ; Eaton & Mains,  [1909] 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Missions -- Africa, Central.--Missions -- Africa, Central.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Africa, Central -- Description and travel.--Africa, Central -- Description and travel.