380.50954
I39T
           Dalvi, M Q
               Test and calibration of gravity model for inter-state movements of coal and foodgrains in India \ M Q Dalvi - New Delhi : The Author, 1981.
               iii, 51p. - Working paper; no. 16 .
                ISBN:

109762
109763
113957
                Subjects: Food industry and trade; Food-India; Transportation-India; Coal -India.