A philatelist's history of smallpox variolation.
Tierney
J
J
D001317:Austria; D005197:Famous Persons; D049671:History, 18th Century; D006801:Humans; D009426:Netherlands; D010678:Philately; D012899:Smallpox / Q000266:history* / Q000517:prevention & control; D014611:Vaccination / Q000266:history