[Short history of the first Bulgarian patent in the field of dentistry].
D002031:Bulgaria; D003764:Dental Materials / Q000266:history*; D049673:History, 20th Century; D010330:Patents as Topic / Q000266:history*; D011671:Pulpitis / Q000188:drug therapy
D003764:Dental Materials
Kratka istoriia na purviia bulgarski patent v oblastta na stomatologiiata.