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Credit
Illustrated and descriptive catalogue of Roentgen X-ray apparatus and accessories : apparatus for the generation and application of high frequency currents. Apparatus for the therapeutic application of light energy. Public Domain Mark. Source: Wellcome Collection.
Provider
This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.