Practical oral hygiene : prophylaxis and pyorrhea alveolaris.

Licence: Public Domain Mark

Credit: Practical oral hygiene : prophylaxis and pyorrhea alveolaris. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.