19th century dentistry 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; D009519:New York City; D009671:Nostrums / Q000266:history; D011215:Practice Management, Dental / Q000266:history*
D009671:Nostrums