Plain or Roller Bearings?: An Economic Survey with Particular Reference to the Broad Gauge I.R.S. 4-wheel Wagon

“Study on Hot Box” 1958 publication, Japanese National Railways.

“Economics of Freight Car Roller Bearings” by Horger O. J. —Railway Age 1952.

“French Railway Techniques”, publication September-October 1958.

U.I.C. & A.A.R. Reports on the Extension of Roller Bearing Application on Wagon Stock.

Car Builders Cyclopedia, 21st edition, published by Simmons-Boardman Publishing Corporation, 30 Church St., New York 7, N. Y.