TY  - RPRT
TI  - Upper gastrointestinal endoscopy in surgical practice.
AU  - R J Thomas
PY  - 1976
DO  - 10.5694/j.1326-5377.1976.tb134420.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1086421/
ID  - 1086421
ER  -