title: Burnette's folding trade card with laughing "gas" surcharge.
mesh_terms: D000329:Advertising / Q000266:history*; D006665:History of Dentistry; D049673:History, 20th Century; D006801:Humans; D009609:Nitrous Oxide / Q000191:economics / Q000266:history*; D014081:Tooth Extraction / Q000191:economics / Q000266:history
chemical_list: D009609:Nitrous Oxide