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Citace podle Chicago (17th ed.)International Society of Ultrasound in Obstetrics and Gynecology. Ultrasound in Obstetrics & Gynecology. Carnforth, Inglaterra: Parthenon Publishing, 1991.
Citace podle MLA (8th ed.)International Society of Ultrasound in Obstetrics and Gynecology. Ultrasound in Obstetrics & Gynecology. Parthenon Publishing, 1991.
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