Norman S. Helm books & textbook

Classic Rails : The Vermont Railway; Moving Iron Ore in Canada; The Cass Scenic Railway; Sacramento Railroad Museum; Seaboard Coast Line and the CTC system in Caroline (1977 Journal)

Richard Steffen Norman S. Helm Ernest H. Robl

Challenge Publishing /1977T Journal

Rail Classics Magazine, Volume 8 Number 1, January 1979

Ed Strauss K. J. Carlton Raymond J. Marsh Vera D. Saban Denis Dunning Norman S. Helm Don Sims John Uckley Stanley J. Baker John J. Hilton

Challenge Publications /1979T Single Issue Magazine / 82 Pages

John Marin

Wight, Frederick S.; Mackinley Helm; William Carlos Williams & Dorothy Norman Well-illustrated

University of California Pre /1956T Hardcover