TY  - RPRT
TI  - Letter: Occult perforations.
AU  - B K Mandal
AU  - P F Schofield
PY  - 1976
DO  - 10.1136/bmj.1.6015.963
UR  - https://pubmed.ncbi.nlm.nih.gov/1268514/
ID  - 1268514
ER  -