"Congress Calendar" Journal of Perinatal Medicine, 34.2 (2006): 179-180. Retrieved 20 Jun. 2013, from doi:10.1515/jpme.2006.34.2.179

Congress Calendar. Journal of Perinatal Medicine (2006), 34(2), pp. 99-180. Retrieved 20 Jun. 2013, from doi:10.1515/jpme.2006.34.2.179

Congress Calendar. Journal of Perinatal Medicine. 2006. 34(2): 99-180. Retrieved 20 Jun. 2013, from doi:10.1515/jpme.2006.34.2.179