Template:Ref-Lewis1920
From Embryology
Lewis WH. The Cartilaginous Skull Of A Human Embryo Twenty-One Millimeters In Length. (1920) Carnegie Instn. Wash. Publ. 272, Contrib. Embryo., 9: 299-324.
Lewis WH. The Cartilaginous Skull Of A Human Embryo Twenty-One Millimeters In Length. (1920) Carnegie Instn. Wash. Publ. 272, Contrib. Embryo., 9: 299-324.