Dentistry on stamps.
Loevy
Hannelore T
HT
Kowitz
Aletha A
AA
D001241:Aspirin / Q000266:history*; D016861:Cyclooxygenase Inhibitors / Q000266:history*; D049672:History, 19th Century; D010678:Philately
D016861:Cyclooxygenase Inhibitors; D001241:Aspirin