An essay on asphyxia (apnoea) / by George Johnson.

Licence: Public Domain Mark

Credit: An essay on asphyxia (apnoea) / by George Johnson. 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.