@misc{indiciaea0ab8155ff8a,
  title = {Evaluation of program efficiency.},
  author = {O L Deniston and I M Rosenstock and W Welch and V A Getting},
  year = {1968},
  url = {https://pubmed.ncbi.nlm.nih.gov/4969692/},
  note = {Source identifier: 4969692}
}