TY  - RPRT
TI  - Backache relieved by polystyrene mattress.
AU  - H Hill
PY  - 1973
DO  - 10.1016/s0140-6736(73)91243-9
UR  - https://pubmed.ncbi.nlm.nih.gov/4118550/
ID  - 4118550
ER  -