@misc{indiciaefe34a5e1458f,
  title = {[Methodology in discriptive gerontologic studies--basic problems of the so-called cross sectional and longitudinal studies].},
  author = {D Voigt and G Brüschke},
  year = {1969},
  url = {https://pubmed.ncbi.nlm.nih.gov/5380258/},
  note = {Source identifier: 5380258}
}