Proceedings-Technical papers. 

 - Pretoria :    s.n. ,    1952. 
 - v. :    ill. ;    25 cm. 
<br/><br/>  November 1952.   Volume 1-Sections I, II and III. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Technical reports -- Congressess.