Lankester, E. R. (1877). Notes on the Embryology and classification of the Animal kingdom: comprising a revision of speculations relative to the origin and significance of the germ-layers. Quarterly Journal of Microscopical Science. 68: 399-454.
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Lankester, E. R.
1877
Notes on the Embryology and classification of the Animal kingdom: comprising a revision of speculations relative to the origin and significance of the germ-layers