Principles of mining Valuation, organization and administration, cooper, gold, lead, silver, tin and zinc.
Hoover, Herbert, 1874-1964,
Principles of mining : Valuation, organization and administration, cooper, gold, lead, silver, tin and zinc.
Minas y riquezas minerales
Industria minera
TN145 / H63
Principles of mining : Valuation, organization and administration, cooper, gold, lead, silver, tin and zinc.
Minas y riquezas minerales
Industria minera
TN145 / H63