Area map of the El Paso Valley. Includes topographic ...

Topography of El Paso County, Texas and the El Paso Quadrangle. ...

This map represents the Fort Bliss Quadrangle in El Paso County, ...

Interior of plant showing copper ingots on conveyors. ...

Title: Production. Copper (refining). Electrolytic tanks in a ...

Title: Production. Copper (refining). Sheets of copper produced ...

Trimming bars of pure copper at a large refining operation. ...

El Paso, Texas, Phelps Dodge refining company. Electrolytic ...

Phelps Dodge refining company, El Paso, Texas. Copper sheets on ...

Phelps Dodge plant, El Paso.

Phelps Dodge refining company, El Paso, Texas. Shearing sheets ...

Phelps Dodge refining company, El Paso Texas. Interior of the ...