@article{DA,
      recid = {6826},
      title = {Artificial heart valve testing equipment},
      publisher = {Oregon Health & Science University},
      number = {DA},
      abstract = {Black-and-white diagram of equipment developed by M.  Lowell Edwards to test the durability of Starr-Edwards  artificial heart valves. The diagram is titled: Medium  Frequency Life Tester (1700-3400 Pulses/Minute). Digital  scan of a 35mm slide.},
      url = {http://digitalcollections.ohsu.edu/record/6826},
      doi = {https://doi.org/10.6083/M45B013K},
}