The mark of a scientist.
Aronson
S M
SM
D007887:Fabaceae / Q000266:history; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009885:Ophthalmology / Q000266:history*; D010946:Plants, Medicinal; D012606:Scotland; D009626:Terminology as Topic