title: [Conflict of orientation of the different parts of the anterior half of the blastoderm of birds].
authors.forename: H
authors.initials: H
authors.lastname: LUTZ
mesh_terms: D000818:Animals; D001717:Birds; D001756:Blastoderm; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian