@misc{indiciae912d14c51b6a,
  title = {Changes in self-concepts during a physical development program.},
  author = {W R Johnson and B R Fretz and J A Johnson},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/5246959/},
  note = {Source identifier: 5246959}
}