TY  - RPRT
TI  - Aphthous ulcers and folate.
AU  - B D Birt
AU  - J H Mather
PY  - 1968
DO  - 10.1136/bmj.2.5607.763-c
UR  - https://pubmed.ncbi.nlm.nih.gov/5656285/
ID  - 5656285
ER  -