Diamond Drilling for Gold and Other Minerals, A Practical...
Denny, George Alfred / Denny, G. a.
This rare antiquarian text contains a comprehensive treatise on diamond drilling, written with particular concern for the needs of South African diamond drillers and for other persons who may be contemplating the use of diamond drilling machines in connection with the prospecting of exploitation of mineral lands in South Africa. A must-read for anyone with a historical interest in diamond-drilling, this book makes a great addition to any colle...