@article{DA,
      url = {http://digitalcollections.ohsu.edu/record/6839},
      title = {Artificial heart valves},
      abstract = {Digital scan of a 35mm slide. Black-and-white image of  seven early models of artificial heart valves.},
      number = {DA},
      doi = {https://doi.org/10.6083/M4GM85Z1},
      recid = {6839},
}