@misc{indiciaedb35e71a173d,
  title = {Topical issues--a U.S. viewpoint.},
  author = {R E Vlietstra and R L Frye},
  year = {1989},
  doi = {10.1016/0167-5273(89)90242-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/2722283/},
  note = {Source identifier: 2722283}
}