Words matter.
Simonsen
R J
RJ
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003188:Composite Resins / Q000737:chemistry*; D003723:Dental Amalgam / Q000737:chemistry; D003793:Dental Restoration, Permanent / Q000145:classification; D006801:Humans; D009626:Terminology as Topic
D003188:Composite Resins; D003723:Dental Amalgam