TY  - RPRT
TI  - Electronic data base in gastroenterological endoscopy.
AU  - M Classen
AU  - F Wagner
AU  - W Swobodnik
PY  - 1991
DO  - 10.1055/s-2007-1010602
UR  - https://pubmed.ncbi.nlm.nih.gov/2009834/
ID  - 2009834
ER  -