US Regional & Pacific
EDSON, William D.; VAIL, H. L. & SMITH, C. M.
New York Central System Diesel Locomotives
EHERNBERGER, James L. & GSCHWIND, Francis G.
Union Pacific Steam - Eastern District
A combined printing of the authors' three works on Union Pacific steam in Nebraska, Wyoming and Kansas, with additional bibliography and index:
Smoke Across the Prairie (second edition);
Smoke Over the Divide;
Smoke Above the Plains.