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- [1] The Colonial Railways with Particular Reference to Africa PETERMANNS MITTEILUNGEN, 1917, 63 : 225 - 225
- [9] Government Ownership of Railways ANNALS OF THE AMERICAN ACADEMY OF POLITICAL AND SOCIAL SCIENCE, 1914, 52 : 245 - 246
- [10] Government Ownership of Railways ANNALS OF THE AMERICAN ACADEMY OF POLITICAL AND SOCIAL SCIENCE, 1911, 37 (03): : 184 - 185