List of the specimens of fish in the collection of the British Museum. Part I. Chondropterygii. British Museum (Natural History), London, 160 pp
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Studies on the head in fishes. Embryological, morphological, and phylogenetical researches. Part I. Development of the skull in sharks and rays. Acta Zoologica(Stockholm), 21(1–3), 51–267
DOI: 10.1111/j.1463-6395.1940.tb00339.x