@article{DA,
      recid = {4750},
      author = {Cambridge Instrument Company},
      title = {Simplitrol Portable Model Cambridge Electrocardiograph},
      address = {1933},
      number = {DA},
      abstract = {ca. 1933?},
      url = {http://digitalcollections.ohsu.edu/record/4750},
      doi = {https://doi.org/10.6083/M43B5XKW},
}