TY  - RPRT
TI  - Historical development of endoscopy.
AU  - Larry L Cunningham
AU  - Gilman P Peterson
PY  - 2003
DO  - 10.1016/s1061-3315(03)00018-0
UR  - https://pubmed.ncbi.nlm.nih.gov/14552049/
ID  - 14552049
ER  -