Template:Ref-Peter1904
From Embryology
Peter K. Normal plates of the development of vertebrates (Normentafeln zur Entwicklungsgeschichte der Wirbelthiere) Vol. 4. Normal Plates of the Development of the Sand Lizard Embryo. (3. Heft Normentafeln zur Entwicklungsgeschichte Lacerta agilis) (1904) Fisher, Jena., Germany.