title: Ontogeny of the retina and optic nerve of Xenopus laevis. IV. Ultrastructural evidence of early ganglion cell differentiation.
mesh_terms: D000818:Animals; D001369:Axons / Q000648:ultrastructure; D002454:Cell Differentiation; D009900:Optic Nerve / Q000196:embryology* / Q000648:ultrastructure; D012160:Retina / Q000196:embryology* / Q000648:ultrastructure; D014981:Xenopus / Q000196:embryology*