TY  - RPRT
TI  - A simple method of relaxation.
AU  - N J Yorkston
AU  - H G Sergeant
PY  - 1969
DO  - 10.1016/s0140-6736(69)90861-7
UR  - https://pubmed.ncbi.nlm.nih.gov/4188090/
ID  - 4188090
ER  -