@article{ETD,
      school = {M.S.},
      author = {Hoffman, John W.},
      url = {http://digitalcollections.ohsu.edu/record/1726},
      title = {Classically conditioned changes in heart rate and blood  pressure based on electric shock or ammonia-fumes  reinforcement},
      number = {ETD},
      doi = {https://doi.org/10.6083/M45B00NB},
      recid = {1726},
      address = {1977},
}