Herzig, Charles Simon.
Mine sampling and valuing : a discussion of the methods used in sampling and valuing ore deposits, with especial reference to the work of valuation by the independent engineer / by Charles Simon Herzig and Chester Wells Purington. - 60p. : ill. ; 25 cm.
english
14004561
Mine examination.
Mine valuation.
TN272 / .H4
622.14/HEM
Mine sampling and valuing : a discussion of the methods used in sampling and valuing ore deposits, with especial reference to the work of valuation by the independent engineer / by Charles Simon Herzig and Chester Wells Purington. - 60p. : ill. ; 25 cm.
english
14004561
Mine examination.
Mine valuation.
TN272 / .H4
622.14/HEM