TY  - RPRT
TI  - Gastrointestinal endoscopy: some perspectives.
AU  - A K Grant
AU  - H A Harley
PY  - 1982
DO  - 10.1136/bmj.285.6345.868
UR  - https://pubmed.ncbi.nlm.nih.gov/6811049/
ID  - 6811049
ER  -