@article{DA,
      url = {http://digitalcollections.ohsu.edu/record/6807},
      title = {Artificial heart valves},
      abstract = {Digital scan of a 35mm slide. Black and white image of two  artificial heart valves with metal valve closures inside  white mesh cloth-covered discs. Valves are resting on a  fabric background.},
      number = {DA},
      doi = {https://doi.org/10.6083/M4MG7N50},
      recid = {6807},
}