Template:Ref-Caldwell1887
From Embryology
Caldwell WH. The Embryology of Monotremata and Marsupialia Part I. (1887)[Category:Echidna]][Category:Platypus]]
Caldwell WH. The Embryology of Monotremata and Marsupialia Part I. (1887)[Category:Echidna]][Category:Platypus]]