@misc{indiciae4677ffc69b14,
  title = {Hematemesis and melena.},
  author = {S J GRAY and T E OLSON and J MANRIQUE},
  year = {1957},
  doi = {10.1016/s0025-7125(16)34383-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/13464253/},
  note = {Source identifier: 13464253}
}