Template:Ref-Kerr1909
From Embryology
Kerr JG. Normal Plates of the Development of the South American and African Lungfish Embryos (Lepidosiren paradoxa and Protopterus annectens). (1909) Vol. 10 in series Normal plates of the development of vertebrates (Normentafeln zur Entwicklungsgeschichte der Wirbelthiere) Fisher, Jena., Germany.