KHALID , M, et al. “EFFECTIVENESS OF 25G COMPARED TO 27G QUINCKE SPINAL NEEDLE IN REGARD OF POST-DURAL PUNCTURE HEADACHE IN OBSTETRICS PATIENTS UNDERGOING SPINAL ANESTHESIA”. Biological and Clinical Sciences Research Journal, vol. 2023, no. 1, June 2023, p. 359, doi:10.54112/bcsrj.v2023i1.359.