Wybergh, W. <br/><br/>
The building stones of the Union of South Africa / 
by W. Wybergh. 
 - Pretoria :  The Government Printer,  1932. 
 - 244 p., [4] leaves of plates (some fold.) :  ill., diagrs., map, table ;  25 cm. 
 - Geological Survey memoir ;  no. 29 .
 - Memoir (Geological Survey (South Africa)) ;  no. 29. .
<br/><br/> At head of title: Union of South Africa. Department of Mines and Industries. 
<br/><br/>With: A bibliography of South African geology for the years 1931 to 1935  (inclusive) : authors' index / by A. L. Hall -- The pegmatite area south of the Orange river in Namaqualand / by T. W. Gevers, F. C. Partridge, and G. K. Joubert. Pretoria : The Government Printer, 1937.  Bound together subsequent to publication. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>LCCN: </label>gs 32000264  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Building stones--South Africa.
<br/><br/><label>LC Class. No.: </label>QE324  / .A3 no. 29