TY  - RPRT
TI  - Understanding the gastrointestinal system. Part 2.
AU  - E A Harald
AU  - K Kaufman
PY  - 1994
DO  - 10.1097/00152193-199408000-00035
UR  - https://pubmed.ncbi.nlm.nih.gov/8084571/
ID  - 8084571
ER  -