01359cam a22002774a 4500 gs 32000264 DLC 20260227111337.0 860306s1932 sa abf b f000 0 eng c gs 32000264 (OCoLC)13242791 Library, U.S. Geological Survey NhD NhD DLC premarc QE324 .A3 no. 29 Wybergh, W. 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 At head of title: Union of South Africa. Department of Mines and Industries. 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. DLC Includes bibliographical references and index. Building stones South Africa. South Africa. Department of Mines and Industries. Memoir (Geological Survey (South Africa)) ; no. 29. 26988 26988