Ball, Samuel.
Observations on the expediency of opening a second port in China, addressed to the president and select committee of supercargoes for the management of the affairs of the Honourable East India company in China. (Macao : Printed at the East India Company's Press by P.P. Thoms., 1817).
In : Journal of the Royal Asiatic Society of Great Britain and Ireland, vol. 6 no 1 (1841).
https://archive.org/details/jstor-25207546.
(BalS3)
Economics and Trade
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History : China - Europe : England