Frazer, R.W. (1897). British India. The story of nations. G. P. Putnam's sons. p. 355. Archived from the original on 8 May 2023. Retrieved 8 May 2023.
United States Department of Commerce (1924). Trade and Economic Review for 1922 No.34 (Supplement to Commerce Reports ed.). Bureau of Foreign and Domestic Commerce. p. 46. Archived from the original on 13 May 2023. Retrieved 8 May 2023.
Frazer, R.W. (1897). British India. The story of nations. G. P. Putnam's sons. p. 355. Archived from the original on 8 May 2023. Retrieved 8 May 2023.
United States Department of Commerce (1924). Trade and Economic Review for 1922 No.34 (Supplement to Commerce Reports ed.). Bureau of Foreign and Domestic Commerce. p. 46. Archived from the original on 13 May 2023. Retrieved 8 May 2023.