Author H D Henry Davis Hoskold

Memoria General Y Especial Sobre Las Minas, Metalurgia, Leyes De Minas, Recursos, Ventajas, Etc. De La Explotación De Minas En La Republica Argentina

Engineer's Valuing Assistant; Being a Practical Treatise On the Valuation of Collieries And Other Mines With Rules, Formulæ, And Examples Also a Set of Valuation Tables;

Engineers Valuing Assistant Being a Practical Treatise On the Valuation of Co