1.

図書
図書
1. Economics of transportation
by Marvin L. Fair and Ernest W. Williams, Jr
出版情報: New York : Harper, c1950
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2.

図書
図書
2. Freight transportation in the Soviet Union : including comparisons with the United States
Ernest W. Williams, Jr. ; with the assistance of Gerge Novak and Holland Hunter
出版情報: Princeton : Princeton Universitiy Press, 1962
シリーズ名: National Bureau of Economic Research general series ; no. 76
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