TY  - RPRT
TI  - The string test for upper gastrointestinal bleeding--a new, plastic look.
AU  - C F Johnson
PY  - 1967
DO  - 10.7326/0003-4819-67-5-1115
UR  - https://pubmed.ncbi.nlm.nih.gov/5299013/
ID  - 5299013
ER  -