APA
Dalvi M. Q., India. Planning Commission. UNDP Transport Policy Planning Project & Das T. (1981). Test and calibration of gravity model for inter-state movements of coal and foodgrains in India. New Delhi: The Author.
Chicago
Dalvi M Q, India. Planning Commission. UNDP Transport Policy Planning Project and Das Tarun. 1981. Test and calibration of gravity model for inter-state movements of coal and foodgrains in India. New Delhi: The Author.
Harvard
Dalvi M. Q., India. Planning Commission. UNDP Transport Policy Planning Project and Das T. (1981). Test and calibration of gravity model for inter-state movements of coal and foodgrains in India. New Delhi: The Author.
MLA
Dalvi M Q, India. Planning Commission. UNDP Transport Policy Planning Project and Das Tarun. Test and calibration of gravity model for inter-state movements of coal and foodgrains in India. New Delhi: The Author. 1981.