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APA Citation
Ghi, T., Krsmanovic, J., Azzarone, C., Bellussi, F., Azzerboni, A., Franchi, L., Mazzone, E., Youssef, A., Rizzo, N., Pilu, G., & Frusca, T. (n.d.). p01.09: The occiput spine angle: a new sonographic index of fetal head deflexion during the 1st stage of labour. Ultrasound in obstetrics & gynecology, 46, 124. http://access.bl.uk/ark:/81055/vdc_100074822770.0x000001