From D. Philip Locklin, Economics of Transportation, Seventh Edition ( Homewood, IL: Richard D. Irwin, Inc., 1972). © Richard D. Irwin, Inc., 1972. | |
From Clair Wilcox, Public Policies Toward Business, Revised Edition ( Homewood, IL: Richard D. Irwin, Inc., 1960). © Richard D. Irwin, Inc., 1960. | |
Reprinted by permission of the publisher from Railroad Management, by D. Daryl Wyckoff ( Lexington, Mass.: Lexington Books, D. C. Heath and Company, Copyright 1976, D. C. Heath and Company). |
From various issues of Railway Age magazine, by permission of Simmons-Boardman Publishing Company.
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