TY  - RPRT
TI  - Endoscopy in gastrointestinal bleeding.
AU  - J A Forrest
AU  - N D Finlayson
AU  - D J Shearman
PY  - 1974
DO  - 10.1016/s0140-6736(74)91770-x
UR  - https://pubmed.ncbi.nlm.nih.gov/4136718/
ID  - 4136718
ER  -