Revisiting the history of the dental profession in Pennsylvania: Victorian-era advertising trade cards.
Croll
Theodore P
TP
Department of Pediatric Dentistry, University of Pennsylvania School of Dental Medicine, USA.
Swanson
Ben Z
BZ
D000329:Advertising / Q000266:history*; D006665:History of Dentistry; D049672:History, 19th Century; D049673:History, 20th Century; D010414:Pennsylvania