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Economies of scale in railway transport
Koshal, Rajindar K., (1970)
Indian railways. -Problems and prospects-. A study in the management and working of Indian railways
Saxena, K. K., (1962)
Levels of utilisation
Rao, S. Kishan, (1979)
Economics of broad-gauge railways : Indian experience
Koshal, R. K., (1971)
Marginal cost and resource allocations in transport industry in India
Koshal, R. K., (1972)
Determinants of Nepalese imports
Rijal, Asim, (2000)