Media type: E-Article Title: The Velocity of Second Sound in Mixtures ofHe3andHe4 Contributor: Lynton, Ernest A.; Fairbank, Henry A. imprint: American Physical Society (APS), 1950 Published in: Physical Review Language: English DOI: 10.1103/physrev.79.735.2 ISSN: 0031-899X Keywords: General Physics and Astronomy Origination: Footnote: