Great Northern Engineering Drawing: Building for Signal Maintainer, Linemen and Track, Metal at Libby, Montana, prepared in 1960. Burlington Northern File Number 9632-2, Reference Number 10110.

Great Northern Engineering Drawing: Building for Signal Maintainer, Linemen and Track, Metal at Libby, Montana, prepared in 1960. Burlington Northern File Number 9632-1, Reference Number 10110.

Great Northern Engineering Drawing: Line Change Tool House at Libby, Montana, prepared in 1964. Burlington Northern File Number 9655-1, Reference Number 10104.

Great Northern Engineering Drawing: Line Change Equipment Storage Building at Libby, Montana, prepared in 1969. Burlington Northern File Number 9658-1A, Reference Number 10104, Sheet GS.

Great Northern Engineering Drawing: Line Change Pump House at Libby, Montana, prepared in 1969. Burlington Northern File Number 9658-1, Reference Number 10104.

Great Northern Engineering Drawing: Line Change Metal Pump House at Libby, Montana, prepared in 1969. Burlington Northern File Number 9657-1, Reference Number 10104.

Great Northern Engineering Drawing: Line Change Tool House at Libby, Montana, prepared in 1969. Burlington Northern File Number 9656-1, Reference Number 10104.

Great Northern Engineering Drawing: Line Change Tool House at Libby, Montana, prepared in 1969. Burlington Northern File Number 9655-1, Reference Number 10104.

Great Northern Engineering Drawing: Line Change Section House at Libby, Montana, prepared in 1970. Burlington Northern File Number 9654-1, Reference Number 10109.