@misc{indiciaef6e4cc281ace,
  title = {Self-administration of delta 9-tetrahydrocannabinol by rats.},
  author = {R N Takahashi and G Singer},
  year = {1979},
  doi = {10.1016/0091-3057(79)90274-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/231789/},
  note = {Source identifier: 231789}
}