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Hefford, AE 1910 Notes on teleostean ova and larvae observed at Plymouth in spring and summer, 1909. Journal of the Marine Biological Association of the United Kingdom, 9 (1). 1-58.
Hefford, AE 1908 Note on a conger with abnormal gonad. Journal of the Marine Biological Association of the United Kingdom, 8 (3). 318-319.
Hefford, AE 1908 Note on a hermaphrodite cod (Gadus morrhua). Journal of the Marine Biological Association of the United Kingdom, 8 (3). 315-317.