Chatha, S. S., Butt, M. Q., & Ghumman, A. Q. (2014). GALL STONE ILEUS: A RARE CAUSE OF SMALL BOWEL OBSTRUCTION: Gall Stone Ileus. Pakistan Armed Forces Medical Journal, 64(4), 639-41. https://pafmj.org/PAFMJ/article/view/2044