TY  - RPRT
TI  - A real headache!
AU  - J E Jackson
AU  - C J O'Donnell
PY  - 1989
DO  - 10.1259/0007-1285-62-741-867
UR  - https://pubmed.ncbi.nlm.nih.gov/2790431/
ID  - 2790431
ER  -