Verma, D., Ratan, & Chand, N. (2020). STUDY OF PREOPERATIVE CLINICAL AND INVESTIGATIVE FACTORS PREDICTING DIFFICULT LAPAROSCOPIC CHOLECYSTECTOMY. International Journal of Research -GRANTHAALAYAH, 8(3), 207–213. https://doi.org/10.29121/granthaalayah.v8.i3.2020.144