Template:Ref-Keibel1900
From Embryology
Keibel F. and Abraham K. Vol. 2. Normal Plates of the Development of the Chicken Embryo (Gallus domesticus). (2. Heft Normentafeln zur Entwicklungsgeschichte Gallus domesticus) (1900) Vol. 2 in series Normal plates of the development of vertebrates (Normentafeln zur Entwicklungsgeschichte der Wirbelthiere) Fisher, Jena., Germany.