@article{art1236,
  title = {Differences in CEA Levels According to Histopathology Degree of Adenocarcinoma Rectum at Haji Adam Malik Medan Central General Hospital},
  doi = {10.18535/ijmsci/v5i5.12},
  url = {https://articlecta.com/index.php/ijecs/article/view/1236}
}