Bethmann, Erich W, <br/><br/>
Yemen on the threshold /by Erich W. Bethmann. 

 - Washington,  American Friends of the Middle East,  (c)1960. 
 - 78 pages  illustrations  24 cm. 
<br/><br/>
<br/><br/><label>LCCN: </label>59015869 
<br/><br/><label>LC Class. No.: </label>DS247  / .Y464 1960