http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
This title explains in detail the setting out of the works, shaft sinking, and heading driving, ranging the lines, and levelling under ground, sub-excavating, timbering and brickwork construction of tunnels, with additional chapters relating to the St Gothard tunnel and various urban aqueduct systems.