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APA Citation
Costa, A. G. d., Barros, J. G., Clode, N., & Graça, L. M. d. (2016). levels of agreement between clinical examination and transabdominal ultrasound evaluation of fetal head position in the second stage of labor. Journal of maternal-fetal & neonatal medicine, 29, 473–476. http://access.bl.uk/ark:/81055/vdc_100057499930.0x000025