title: Observations on chick-embryo lens histogenesis in vivo and in vitro.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D002642:Chick Embryo / Q000166:cytology*; D066298:In Vitro Techniques; D007908:Lens, Crystalline / Q000166:cytology / Q000196:embryology*; D008854:Microscopy, Electron