Textbooks of obstetrics and midwifery (1974-1986)
52. Garrey MM, Govan ADT, Hodge C, Callander R (1974) Obstetrics
Illusrated, Second Edition, Churchill Livingstgone: Edinburgh and London.
53. Bodyazhina V (1983) Textbook of Obstetrics: Translated from the Russian
by Alexander Rosinkin (revised from the 1980 edition). Mir Publishers, Moscow.
54. Beischer, NA, MacKay EV (1986) Obstetrics and the Newborn: An
illustrated textbook, Second Edition.  WB Saunders Company, Sydney,
Philadelphia, London, Toronto, Tokyo, Hong Kong, 1986.
http://placentalrespiration.net/
From the bibliography for
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