HUMAN EMBRYO WITH FOUR SOMITES RECOVERED FOR ELECTRON MICROSCOPY; PRELIMINARY COMMUNICATION.
D004583:Electrons; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D006801:Humans; D008648:Mesoderm; D008853:Microscopy; D008854:Microscopy, Electron; D019170:Somites
EMBRYO; MESODERM; MICROSCOPY; MICROSCOPY, ELECTRON