title: Herman V. Allington, A. Fletcher Hall, and the introduction of liquid nitrogen.
authors.forename: Charles
authors.initials: C
authors.lastname: Steffen
mesh_terms: D003451:Cryoprotective Agents / Q000266:history*; D017679:Cryotherapy / Q000266:history; D003880:Dermatology / Q000266:history*; D049673:History, 20th Century; D006801:Humans; D009584:Nitrogen / Q000494:pharmacology; D014481:United States
chemical_list: D003451:Cryoprotective Agents; D009584:Nitrogen