Author:Savage, WHDDate:1972In Bulletin No 76, which gave average data for 1971, it was mentioned that Enyati and Vaalbank collieries ceased production during that year.Read more
Author:Streicher, SF; Sander, WJDate:1971Part of this report, compiled by S.F Striecher, deals with the preparation of the samples, while Part B, written by W.J. Sander , comprises the results of the carbonisation tests and coke testing.Read more