Leetheeragul, J. ., R. Sirisomboon, K. . Pimol, T. . Lertbunnaphong, and P. . Limsiri. “Incidence and Pregnancy Outcomes of Primary Postpartum Hemorrhage Following Implementation of Postpartum Drape With a Calibrated Bag After Normal Vaginal Delivery”. Siriraj Medical Journal, vol. 72, no. 3, Mar. 2020, pp. 219-25, doi:10.33192/Smj.2020.30.