Mine economics sampling, valuation, organization, administration

Xehetasun bibliografikoak
Egile nagusia:	Truscott, Samuel John, 1870-
Formatua:	Liburua
Hizkuntza:	English
Argitaratua:	London Mining Pub. 1947.
Edizioa:	2nd ed.
Gaiak:	Mine valuation. Mining industry and finance. Ores-Sampling and estimation.