Ergebnisse zu
Bergbau

A Brief Outline of the Modern Processes for Extracting the More Important Metals

A History Of The Oil Region Of Venango County, Pennsylvania: Its Resources, Mode Of Development, And Value: Embracing A Discussion Of Ancient Oil..

Its History, Occurrence, Properties, Metallurgy and Application, Including Its Alloys

A Review of the Gold Mining Industry in the United States

A Brief History of the Pennsylvania Petroleum Region, Its Development, Growth, Resources, Etc., From 1859 to 1869