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Rubber in Malaya 1876-1922. The genesis of the industry
Drabble, John H., (1973)
The rubber industry : being the official report of the proceedings of the International Rubber Congress, London 1911, held at the International Rubber and Allied Trades Exhibition, 24th June to 14th July
Torrey, Joseph, (1911)
The world's struggle with rubber : 1905-1931
Lawrence, James Cooper, (1931)