Willis, R. A. (1962). The Borderland of embryology and pathology. Butterworth.
Lua i Stíl Chicago (17ú heag.)Willis, Rupert Allan. The Borderland of Embryology and Pathology. London: Butterworth, 1962.
Lua MLA (9ú heag.)Willis, Rupert Allan. The Borderland of Embryology and Pathology. Butterworth, 1962.
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