@article{DA,
      recid = {4064},
      author = {Maico Hearing Instruments Inc.},
      title = {Maico Stethetron},
      address = {1940},
      number = {DA},
      abstract = {Maico Stethetron, an electronic stethoscope. The chrome  stethoscope plate attaches by wire to a battery pack. A  light blue paper package contains an extra plug. A red  paper instruction sheet reads (on front) "Heart and chest  sounds 10,000 times louder with the tiny new Maico  Stethetron, worlds smallest electronic stethoscope." The  pack measures 11 cm x 4 cm x 2.2 cm. Provenance is  unknown.},
      url = {http://digitalcollections.ohsu.edu/record/4064},
      doi = {https://doi.org/10.6083/M4057D8R},
}