TY  - RPRT
TI  - Upper gastrointestinal endoscopy--a GP service.
AU  - J A Fisher
AU  - J G Surridge
AU  - C P Vartan
AU  - C A Loehry
PY  - 1977
DO  - 10.1136/bmj.2.6096.1199
UR  - https://pubmed.ncbi.nlm.nih.gov/589088/
ID  - 589088
ER  -