Subsequent to the issue of this Institutes Technical Memorandum No. 10 of 1955 the results of additional investigations carried out at the Institute on No. Seam coal taken in the ventilation shaft, about 4500ft north- north-east of Springbok Colliery's main hauling shaft, became available.
Reference:
La Grange, C. 1957. Number 5 seam coal from the ventilation shaft at Springbok Colliery. http://hdl.handle.net/10204/12890 .
La Grange, C. (1957). Number 5 seam coal from the ventilation shaft at Springbok Colliery Retrieved from http://hdl.handle.net/10204/12890
La Grange, CC Number 5 seam coal from the ventilation shaft at Springbok Colliery. 1957. http://hdl.handle.net/10204/12890
La Grange C. Number 5 seam coal from the ventilation shaft at Springbok Colliery. 1957 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/12890
