title: Dr Edgar R. R. Parker: his time and now.
authors.affiliation: St Louis, Mo.
authors.forename: Rolf G
authors.initials: RG
authors.lastname: Behrents
mesh_terms: D000329:Advertising / Q000266:history*; D000766:Anesthesia, Dental / Q000266:history; D000772:Anesthesia, Local / Q000266:history; D002170:Canada; D003815:Dentists / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D014481:United States