@misc{indiciaeb2c792b5e060,
  title = {Shapes and sounds as self-objects in learning geography.},
  author = {E A Baum},
  year = {1978},
  doi = {10.1007/bf01463554},
  url = {https://pubmed.ncbi.nlm.nih.gov/688805/},
  note = {Source identifier: 688805}
}