High frequency currents : their production, physical properties, physiological effects, and therapeutical uses / by H. Evelyn Crook.

Public Domain Mark

You can use this work for any purpose without restriction under copyright law. Read more about this licence.

Credit

High frequency currents : their production, physical properties, physiological effects, and therapeutical uses / by H. Evelyn Crook. Public Domain Mark. Source: Wellcome Collection.