American Railway Association. The Invention of the Track Circuit The history of Dr. William Robinson's invention of the track circuit, the fundamental unit which made possible our present automatic block signaling and interlocking systems.
Chicago Style (17th ed.) CitationAmerican Railway Association. The Invention of the Track Circuit The History of Dr. William Robinson's Invention of the Track Circuit, the Fundamental Unit Which Made Possible Our Present Automatic Block Signaling and Interlocking Systems.
MLA (9th ed.) CitationAmerican Railway Association. The Invention of the Track Circuit The History of Dr. William Robinson's Invention of the Track Circuit, the Fundamental Unit Which Made Possible Our Present Automatic Block Signaling and Interlocking Systems.