TY  - RPRT
TI  - Endoscopy today. 1. Rigid endoscopes.
AU  - G Berci
PY  - 1972
DO  - 10.1080/00325481.1972.11698129
UR  - https://pubmed.ncbi.nlm.nih.gov/4259783/
ID  - 4259783
ER  -