Kausar, Shaheen, Arif Tajammul, Shahida Sheikh, Saima Iqbal, and Shamaila Anwar. 2007. “FREQUENCY OF BACKACHE IN PREGNANCY WOMEN ATTENDING ANTENATAL CLINIC: Backache in Pregnant Women”. Pakistan Armed Forces Medical Journal 57 (4):258-63. https://pafmj.org/PAFMJ/article/view/354.