@misc{indiciae9e9954f4d693,
  title = {Designing and testing self-help interventions.},
  author = {L O Walker and M K Sandor and D Sands},
  year = {1989},
  doi = {10.1016/s0897-1897(89)80055-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/2719491/},
  note = {Source identifier: 2719491}
}