Template:Ref-HubrechtKeibel1907
From Embryology
Hubrecht AAW. and Keibel F. Normal Plates of the Development of the Lungfish Embryo (ceratodus forsteri). (1907) Vol. 7 in series Normal plates of the development of vertebrates (Normentafeln zur Entwicklungsgeschichte der Wirbelthiere) Fisher, Jena., Germany.