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Daisley, KW and Fisher, LR 1958 Vertical distribution of vitamin B12 in the sea. Journal of the Marine Biological Association of the United Kingdom, 37 (3). 683-686.
Daisley, KW 1958 A method for the measurement of vitamin B12 concentration in sea water. Journal of the Marine Biological Association of the United Kingdom, 37 (3). 673-681.