@article{DA,
      url = {http://digitalcollections.ohsu.edu/record/6847},
      title = {Artificial heart valve surfaces},
      abstract = {Digital scan of a 35mm slide. Side-by-side comparison of  two electron microscope images of surfaces of artificial  heart valves labeled A 550x-D and B 19X-D.},
      number = {DA},
      doi = {https://doi.org/10.6083/M4FN14VN},
      recid = {6847},
}