Abstract
References
1.
Keibel
Mall
. “Human Embryology,” Philad. and Lond . 1910 , i , p. 55 .
2.
Sobotta
, “Die Entwicklung des Eies der Maus ,” Arch. f. mikr. Anat. Bonn , 1903 , lxi , p. 274 .
3.
Teacher
. Proceedings , 1908 , i , p. 264 .