Hardening gypsum casts: an historical perspective.
D002133:Calcium Sulfate / Q000266:history*; D002627:Chemistry, Physical; D003734:Dental Casting Investment / Q000266:history*; D006244:Hardness; D049672:History, 19th Century; D049673:History, 20th Century; D013499:Surface Properties
D003734:Dental Casting Investment; D002133:Calcium Sulfate