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Bullen, GE 1912 Some notes upon the feeding habits of mackerel and certain clupeoids in the English Channel. Journal of the Marine Biological Association of the United Kingdom, 9 (3). 394-403.
Bullen, GE 1908 Plankton studies in relation to the western mackerel fishery. Journal of the Marine Biological Association of the United Kingdom, 8 (3). 269-302.