@article{DA,
      url = {http://digitalcollections.ohsu.edu/record/6861},
      title = {Artificial heart valves},
      abstract = {Digital scan of a 35mm slide. Image of two ball-and-cage  style artificial heart valves set on an orange-red  background. The valve on the left has a metal ball, while  the valve on the right has a white plastic ball. Both balls  are enclosed in white mesh cloth-covered cages.},
      number = {DA},
      doi = {https://doi.org/10.6083/M4N58K1Z},
      recid = {6861},
}