Influenza causing sunspots?
Lyons
D
D
Murphy
G
G
D004196:Disease Outbreaks / Q000266:history*; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007251:Influenza, Human / Q000453:epidemiology / Q000266:history*; D008685:Meteorological Concepts