"Dark-field" illumination for micro-surgical operations on chick blastoderms in vitro.
D000818:Animals; D002642:Chick Embryo; D005855:Germ Layers / Q000254:growth & development*; D006652:Histological Techniques; D008029:Lighting; D008722:Methods; D008853:Microscopy; D008866:Microsurgery