@article{DA,
      url = {http://digitalcollections.ohsu.edu/record/6815},
      title = {Artificial heart valves},
      abstract = {Digital scan of a 35mm slide. Black-and-white side-by-side  image of two ball-and-cage style artificial heart valves,  probably Starr-Edwards models. White plastic ball is  enclosed in a metal cage, set in a dark mesh cloth-covered  disc.},
      number = {DA},
      doi = {https://doi.org/10.6083/M4KK99FX},
      recid = {6815},
}