New mining fields in eastern Nicaragua
1920
0024
The consumption neither of cyanide climbs to two pounds per ton nor of the mineral involved where a cyanide plant has been installed under conditions requiring oil flotation
Ministerio de Energía y Minas - Centro de Documentación
Marjorie Montiel
Hospital Bautista, 1 C. Este, 1 Cuadra al Norte. Managua
2280-9500 al 09
De Lunes a Viernes de las 8:00am - 5:00pm.
