37 pages of Railroad Mechanical Bulletins and papers. Maintenance of the CFK-4225 Type Vapor-Clarkson Steam Generator Bulletin No. 1064 Vapor Car Heating Company Incorporated Railway Exchange Chicago, IL October, 1946. Modified Wheel Slip Control-GP7 Type Locomotives 5058 May, 1952. EMD Diesel Unit Equipment Data Alco Diesel Equipment Data May 21, 1957. Electro-Motive Pointers Division of General Motors Corporation LaGrange, IL November 26, 1958. "B-1" and "C-1" Type Leveling Valves Westinghouse Air Brake Division Westinghouse Air Brake Company Wilmerding, PA October, 1965.