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Corundum in the Union of South Africa
C. M. Schwellnus
D. J. L. Visser
Francis Chamberlain Partridge
Gideon Krige Joubert
Johannes Willemse
L. E. Kent
Louis Taylor Nel
Oscar Weiss
Wilhelm Kupferbürger
B. Wasserstein
Bernard Vermeulen Lombaard
D. J. Simpson
H. Jacobs
G. L. Paver
J. T. Allan
G. R. Bozzoli
出版
Government Printer, South Africa
, 1934
URL
http://books.google.com.hk/books?id=EceRPUqodDIC&hl=&source=gbs_api