@article{DA,
      url = {http://digitalcollections.ohsu.edu/record/4783},
      title = {Evolution of the foot engine},
      abstract = {Digital photograph of a black and white illustration of  various models of dental foot engines, manufactured in the  nineteenth and early twentieth centuries.},
      number = {DA},
      doi = {https://doi.org/10.6083/M4TQ5ZX3},
      recid = {4783},
}